Genetics Workbook 2021-22

GENETICS WORKBOOK 2021-22

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Part I
1. For each genotype below, circle whether it is a hybrid/heterozygous or
purebred/homozygous
RR: Heterozygous or Homozygous gg: Heterozygous or Homozygous Hh:Purebred or Hybrid

Tt: Heterozygous or Homozygous rr: Heterozygous or Homozygous Gg: Purebred or Hybrid
Rr: Heterozygous or Homozygous HH:Purebred or Hybrid tt: Purebred or Hybrid
hh: Heterozygous or Homozygous
In Monsters the following traits are dominant and recessive.

Trait Dominant Recessive
# of Eyes Two (T) one (t)
Skin Color Green (G) blue (g)
Coat Texture Rough(R) smooth (r)
Horns Has Horns (H) no horns (h)
2. Write all possible genotypes next to the descriptions.

a. Two eyes _______________ d. one eye _______________
b. Green Skin _____________ e. blue skin _______________
c. Has horns _______________ f. no horns _______________
3. Determine the phenotype for each genotype using the information provided about the
Monsters.
a. TT ______________ Tt ______________ tt ______________

b. GG ______________ Gg ______________ gg ______________
c. RR______________ Rr ______________ rr ______________
d. HH ______________ Hh ______________ hh ______________
Part II. Complete the following Punnet squares & answer the question for each square.
4. Tt x TT ______________ % of the offspring that has two eyes
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5. GG x gg
______________ % of the offspring that has green skin
6. Rr x Rr
______________ % of the offspring that has rough coat
7. hh x hh
______________ % of the offspring that has horns
8. Cross a heterozygous two-eyed monster with one-eyed monster.
____________________________ % Genotype of the offspring

____________________________ % Phenotype of the offspring
9. Cross a homozygous green monster with a blue monster.
__________________________ % Genotype of the offspring

__________________________ % Phenotype of the offspring
10. Cross two heterozygous horned monsters.
_____________________ % Genotype of the offspring

_____________________ % Phenotype of the offspring
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11. Mike’s mother has a genotype of Gg : Tt : Hh
Mike’s father has a genotype of gg : Tt : Hh
Draw Mike’s parents:
Mother Father
12. If Mike is green, one eyed, and has horns, what are the potential genotypes he could
have for each trait based on his parent’s genotypes? _________, _________, ________
13. Make a Punnett Square for each of the three traits using his parent’s genotypes
(Gg : Tt : Hh & gg : Tt : Hh)
14. In the Punnett squares circle the genotypes that work for Mike’s phenotypes.

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Name _________________
Period 1 2 3 4 5 6 7 8
Should this dog be called “SPOT”?
Imagine this microscopic drama. A sex cell from a male dog joins with a sex cell from a female dog. Each
dog’s sex cell carries 39 chromosomes. The zygote which results contains 78 chromosomes. It receives
a set of chromosomes from each parent. Suppose you could look at one pair of the zygote’s
chromosomes.
Chromosome from the female dog
L b C S
L
Chromosome from the male dog
ll b C ss
l
Each chromosome of the pair contains genes for the same traits. But one chromosome may have a
dominant gene and the other a recessive gene. Use the drawing and the chart to answer the questions.
Trait Dominant Gene Recessive Gene
Hair length Long (L) Short (l)
Hair texture Bristly (B) Silky (b)
Hair curliness Curly (C) Straight (c)
Coat pattern Spotted (S) Solid (s)
1. Would the new puppy have a spotted coat? ____________

2. Explain why
_________________________________________________________________________
_________________________________________________________________________
3. Does the female dog have a spotted coat? ______________
4. Explain why
_________________________________________________________________________
_________________________________________________________________________
5. Does the male dog have a spotted coat? _____________
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1. Would the puppy have curly or straight hair? ___________________
2. Does the female dog have curly hair? _________________
3. Does the male dog have curly hair? ________________
4. Is the puppy heterozygous or homozygous for hair length? ______________________
5. Create a punnett square for hair texture if mom has a genotype of Bb and dad’s genotype is bb.
Genotype for offspring Phenotype for offspring
6. What is the phenotype of the mom? __________________________

7. What is the phenotype of the dad? __________________________
8. What are the chances they will have puppies with bristly hair? ______________
9. What are the chances the puppies will be homozygous? _________________
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Name_________________
Period 1 2 3 4 5 6 7 8
Phenylthiocarbamide says WHAT?
The Genetics Taste Testing Lab
PTC Punnett Square

Complete a Punnett square for a cross between two parents who are both heterozygous
for PTC tasting.
What are the genotypes for each parent? &
1. What are the possible genotypes for their children? (list %’s too!)

2. What are the possible phenotypes for their children? (list %’s too!)

Now, think about your phenotype and what that means for your parents
1. What is your genotype? (or __________)
2. Based on your genotype, what are the possible genotypes for your parents? List all
possible genotypes: _____ & _____ or _____ & _____ or _____ & _____
or _____ & _____ or _____ & _____
3. What are your parents’ possible phenotypes? List all possibilities:

___________________ & ___________________
___________________ & ___________________
___________________ & ___________________
___________________ & ___________________
___________________ & ____________________
4. If you’re a Taster, do both of your parents have to be Tasters? Yes or No

Set up all 5 Punnett squares to help explain your answer.
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5. If you’re a Non-Taster, do both of your parents have to be Non-Tasters? Yes or No
Set up 1 or 2 or all 3 Punnett squares to help explain your answer.
6. Partner up with a student in the classroom. Pretend that you have offspring with
your partner and complete the following using your own genotype:
a. List all of your possible genotypes for you & your partner:
ME: or
My Partner: or
b. Use the Punnett Squares (up to 3 if necessary) below to list all your possible
genotypes & phenotypes of your offspring.
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Name: ______________ Class Period: 1 2 3 4 5 6 7 8
Punnett Square Practice: Minion Genetics

Gru has asked Dr. Nefario to help him get the best Minions possible. He wants to find out which
traits are more likely to be seen in his Minions. He is going to observe the phenotypes and then use
his special science tool to help him predict genotypes of future Minion populations.
What is the name of the special science tool he can use to predict genetic outcomes?
___________________________________________________________________.
Phenotypes are ______________________________________________________________________.

Circle the phenotypes in the list below:
two eyes EE combed hair sprout hair Hh hh one eye ee
Genotypes are the combination of alleles that determine a trait. Circle the genotypes in the list below:
sprout hair Hh EE one eye ee two eyes hh combed hair
A dominant trait is
______________________________________________________________________________
_____________________________________________________________________________.
A recessive trait is
______________________________________________________________________________
_____________________________________________________________________________.
Look at the genotypes below and tell whether it is a heterozygous or homozygous genotype. Then, label
each genotype as showing a dominant or recessive phenotype.
Genotyp
e Heterozygous or Homozygous? Dominant or Recessive Phenotype?
EE __________________________________ _____________________________
Ee __________________________________ _____________________________
tt __________________________________ _____________________________
Tt __________________________________ _____________________________
hh __________________________________ _____________________________
HH __________________________________ _____________________________
Predicting the Outcome:
Having two eyes (E) is dominant over one eye (e) in Minions. Make a
Punnett Square for the cross of a heterozygous female Minion with a one-
eyed male Minion. Give the possible genotype and phenotype outcomes in a
percent ratio.
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Hair (H) in Minions is a trait to be admired. Having sprout
hair is dominant to combed down hair. Show a cross between a
homozygous mom with sprout hair and a purebred dad with
sprout hair. Give the genotype and phenotype ratios for the
offspring.
Short phenotypes are a recessive trait in Minions. Show the cross between two hybrid
Minions and answer the questions below.
T=
t=
What is the genotype of the mom? _______
What is the genotype of the dad? _______
What is the percent chance of having a short baby? _______

What is their possible genotype? _______
What is the percent chance of having a homozygous tall baby? _______
What is the percent chance of having a heterozygous tall baby? _______
What is the chance that these parents can have a purebred baby? Explain your answer.
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
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Name: _______________________ Period: 1 2 3 4 5 6 7 8
Fruit Fly Punnett Squares Worksheet

1) Tan body trait is dominant over the yellow body trait in fruit flies. Fill in the Punnett square
and
determine the expected genotypes and phenotypes of the F1 generation by crossing
homozygous recessive and homozygous dominant parents.
A. Possible genotypes of F1 offspring: __________________________

B. Possible phenotypes of F1 offspring: _________________________
C. Percentage of F1 offspring that are tan: ______% yellow: ______%
D. Percentage of F1 offspring that are homozygous dominant: ______%
E. Percentage of F1 offspring that are heterozygous: ______%
F. Percentage of F1 offspring that are homozygous recessive: ______%
2) Cross a tan male and a tan female from the F1 generation offspring in question 1. Fill in the
Punnett square and determine the expected genotypes and phenotypes of the F2 generation.

C. Percentage of F2 offspring that are tan: ______% yellow: ______%
D. Percentage of F2 offspring that are homozygous dominant: ______%
E. Percentage of F2 offspring that are heterozygous: ______%
F. Percentage of F2 offspring that are homozygous recessive: ______%
3) Normal wing trait is dominant over the vestigial wing trait in fruit flies. Fill in the Punnett
square and determine the expected genotypes and phenotypes of the F1 generation by
crossing heterozygous and homozygous recessive parents.
A. Possible genotypes of F1 offspring: __________________

B. Possible phenotypes of F1 offspring: _________________
C. Percentage of F1 offspring with normal wings: ______%
D. Percentage of F1 offspring with vestigial wings: ______%
E. Percentage of F1 offspring that are homozygous dominant: ______%
F. Percentage of F1 offspring that are heterozygous: ______%
G. Percentage of F1 offspring that are homozygous recessive: ______%
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4) Cross a normal wing male and a vestigial wing female from the F1 generation offspring in
question 3. Fill in the Punnett square and determine the expected genotypes and phenotypes of
the F2 generation.

C. Percentage of F2 offspring with normal wings: ______%
D. Percentage of F2 offspring with vestigial wings: ______%
5) Curly wing trait is dominant over the normal wing trait in fruit flies. Curly wing flies are unable
to fly around but they can hop. Fill in the Punnett square and determine the expected genotypes
and phenotypes of the F1 generation by crossing heterozygous curly wing male and a
heterozygous curly wing female.
A. Possible genotypes of F1 offspring: _____________________

B. Possible phenotypes of F1 offspring: ____________________
C. Percentage of F1 offspring with curly wings: ______%
D. Percentage of F1 offspring with normal wings: ______%
6) Answer the following questions based on crossing a normal wing female and a curly wing
male from the F1 generation offspring in question 5 and the F2 generation results.
F2 Generation results: 120 curly wing and 0 normal wing offspring.

What are the genotypes of the parents that would create this type of F2 offspring?
____ x ____
Explain why it must be these genotypes:
____________________________________________________________________________
____________________________________________________________________________
F2 generation results: 61 curly wing and 57 normal wing offspring.

What are the genotypes of the parents that would create this type of F2 offspring?
____ x____
Explain why it must be these genotypes:
____________________________________________________________________________
____________________________________________________________________________
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Name: _______________________ Period: 1 2 3 4 5 6 7 8
Pea Plant Punnett Squares Worksheet

1) Yellow seeds are dominant over green seeds in pea plants. Fill in the Punnett square and
determine the expected genotypes and phenotypes of the F1 generation by crossing homozygous
recessive and homozygous dominant parents.
Possible genotypes of offspring: __________________________

Possible phenotypes of offspring: _________________________
Percentage of offspring that are yellow: ______% green: ______%
% of offspring that are homozygous dominant: ______%
heterozygous: ______% homozygous recessive: ______%
If there were 100 seeds collected, predict how many would be yellow? _______, green? _______
Predict how many seeds would be homozygous dominant? ________, heterozygous? _________,
homozygous recessive: _________
2) Green pod color is dominant over yellow pod color in pea plants. Fill in the Punnett square and
dominant and heterozygous parents.

Percentage of offspring that are green: ______% yellow: ______%
% offspring that are homozygous dominant: ______%
If there were 200 seeds collected, predict how many would be green? _______, yellow? _______
3) Round seeds are dominant over wrinkled seeds in pea plants. Fill in the Punnett square and
recessive and heterozygous parents.

Percentage of offspring that are round: ______% wrinkled: ______%
If there were 3500 seeds collected, predict how many would be round? _______, wrinkled? _______
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4) Smooth pod shape is dominant over constricted pod shape in pea plants. Fill in the Punnett
square and determine the expected genotypes and phenotypes of the F1 generation by crossing
homozygous recessive and homozygous dominant parents.

Percentage of offspring that are smooth: ______% constricted: ______%
If there were 400 seeds collected, predict how many would be smooth? _______,
5) Tall pea plants are dominant over short pea plants. Fill in the Punnett square and determine the
expected genotypes and phenotypes of the F1 generation by crossing heterozygous and
heterozygous dominant parents.

Percentage of offspring that are tall: ______% short: ______%
If there were 224 seeds collected, predict how many would be tall? ______, short? _______
6) The axial flower position is dominant over the terminal flower position. Fill in the Punnett
square and determine the expected genotypes and phenotypes of the F1 generation by crossing
heterozygous and homozygous dominant parents.

Percentage of offspring that are axial: ______% terminal: ______%
If there were 1176 seeds collected, predict how many would be axial? _______, terminal? _______
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Name ________________________
Period 1 2 3 4 5 6 7 8
Incomplete Dominance Notes
___________________: Genes that are neither dominant nor recessive

It is the blending of equally dominant traits. Each gene blends with the other.
1. In snapdragon flowers, the one allele codes for red flowers (R) and the other allele codes
for white flowers (W). When a red flowered plant is crossed with a white flowered plant,
the result is a plant with pink flowers (RW). The snapdragon exhibits incomplete
dominance. Show the cross in the Punnett square below and answer the following
questions.
a. Genotypes of parent plants _____& _____

Phenotypes of parent plants ___________ & ___________
b. What is the genotype(s) of the offspring?

__________________________________
c. What is the phenotype(s) of the offspring? _________________________________
2. In snapdragon flowers, the one allele codes for red flowers (R) and the other allele
codes for white flowers (W). When a red flowered plant is crossed with a white flowered
plant, the result is a plant with pink flowers (RW). What are the likely results of crossing
1 white with 1 pink flower? Use a Punnett square to support your answer.
a. Genotypes of parent plants _____ & ____

Phenotypes of parent plants ____________& ___________

__________________________________
c. What is the phenotype(s) of the offspring? __________________________________
3. In some cats, the gene for tail length shows incomplete dominance. Cats with long tails
are homozygous (LL). Cats with no tails are homozygous (NN). Cats with short tails are
heterozygous (LN).
What would be the expected genotypes and phenotypes in the offspring of a cross
between two short tail cats? Use a Punnett square to support your answer.
a. Genotypes of parents ___________& __________

Phenotypes of parents ___________ & __________

__________________________________
c. What is the phenotype(s) of the offspring?
__________________________________
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4. What would the parent’s genotypes have to be if 50% of the time their litters always had
long tails? Use a Punnett square to support your answer.

a. Genotypes of parents ___________ & ____________
Phenotypes of parents ____________& ____________

__________________________________
c. What is the phenotype(s) of the offspring?
________________________________
5. In carnations, a cross between red flowers (R) and white flowers (W) produced all pink
flowers (RW). What are the likely results of crossing a pink flower and a red flower?
Use a Punnett square to support your answer.


__________________________________
6. In carnations, a cross between red flowers (R) and white flowers (W) produced all pink
flowers (RW). What are the likely results of crossing 2 pink flowers? Use a Punnett
square to support your answer.


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Name ________________________
Period 1 2 3 4 5 6 7 8
Incomplete Dominance Notes
___________________: Genes that are neither dominant nor recessive

It is the blending of equally dominant traits. Each gene blends with the other.

1. In Mice, the allele for yellow fur(Y) exhibits incomplete dominance over the
allele for white fur (W), with heterozygous having cream fur. What are the
likely results of crossing a yellow mouse with a cream mouse? Show the
cross in the Punnett square below and answer the following questions.
a. Genotypes of parent mice ___________ & __________
Phenotypes of parent mice ______________ & ______________
b. What percent of the offspring will be yellow? _____

c. What percent of the offspring will be cream? _____
d. What percent of the offspring are homozygous? ____
e. What percent of the offspring are heterozygous? ____
2. In Mice, the allele for yellow fur(Y) exhibits incomplete dominance
over the allele for white fur (W). with heterozygous having cream
fur. What would the parents’ genotypes be if the litter were always
25% white? Use a Punnett square to support your answer.
a. Genotypes of parent mice ______________ &

______________
3. In Andalusian chickens, the allele for black feathers(B) exhibits incomplete dominance over
the allele for white(W), with heterozygous having blue-grey. What are the likely results of
crossing a white feathered chicken with a black feathered chicken? Show the cross in the
Punnett square below and answer the following questions.
a. Genotypes of parent chickens ___________& __________

Phenotypes of parent chickens ___________ & __________
b. What percent of the offspring will have black feathers? _____

c. What percent of the offspring will have blue-grey feathers? _____
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4. In Andalusian chickens, the allele for black feathers(B) exhibits
incomplete dominance over the allele for white(W), with heterozygous
having blue-grey. What would the parent’s genotypes have to be if 50%
of the time their litters always had long white feathers? Use a Punnett
square to support your answer.


5. In Manx cats, the allele for long tails(L) exhibits incomplete
dominance over the allele for no tail(N), with heterozygous having
small tails. What are the likely results of crossing a manx with no tail
and manx with a short tail? Show the cross in the Punnett square
below and answer the following questions.

b. What percent of the offspring will have a long tail? _____
c. What percent of the offspring will have no tail? _____
6. Two short-tailed (Manx) cats are bred together. They produce three
kittens with long tails, five short tails, and two without any tails. From
these results, how do you think tail length in these cats are inherited?
________________________
Show the genotypes for both the parents and the offspring to support
your answer.

b. What is the genotype(s) of the offspring? _______________

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Name____________ Class period___

Fingerprints and Incomplete Dominance Lab
Background Information: Every person has their own unique pattern of fingerprints. Although no
two people have the same fingerprints, all fingerprints fall into 3 major categories: Whorl, Loop,
and Arch. There is variation within these types that give us totally unique fingerprints.
Whorl Loop Arch

LL LA AA
1. Which print pattern(s) are homozygous? ___________________________________
2. Which print pattern(s) are heterozygous? __________________________________
3. Which print pattern is determined by incomplete dominance? __________________
4. Why is it possible to determine your genotype of your finger print pattern gene just by looking
at your phenotype?
______________________________________________________________________
5. If a man who had all arches for fingerprints married a woman who had all whorls for
fingerprints, what possible fingerprints could their offspring have? Show the cross in the Punnett
square below and answer the following questions.
A. Percent of offspring with whorls? _______
B. Percent of offspring with loops? _______
C. Percent of offspring with arches? _______
6. If a woman who had all loops for fingerprints married a man who had all arches for
fingerprints, what possible fingerprints could their offspring have? Show the cross in the Punnett
square below and answer the following questions.
A. Percent of offspring with whorls? _______
B. Percent of offspring with loops? _______
C. Percent of offspring with arches? _______
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A. Problem: Use your phenotype to determine your genotype for the fingerprint pattern gene.
B. Method:
1. Prepare a scotch tape fingerprint of your left index finger.
a. With pencil, darken about 1 square inch of a piece of scratch paper
B. Rub the finger pad of your left finger on the dark spot
C. Place a strip of scotch tape on the finger pad (which should now be covered
in pencil lead), sticky side down
D. Remove the tape- your fingerprint outline will remain on the tape
E. Place the tape in the space below
Your print Here!!!
C. Data:
1. Record your genotype here____________
2. Record your phenotype____________
3. Is your print pattern the direct result of incomplete dominance? yes or no
4. Find at least one classmate with each phenotype and place their tape print below
Phenotype_____________ __________________ ________________

Genotype______________ __________________ ________________
Name _______________ __________________ ________________

5. What pattern seemed to be most common in your class? ___________ What is the
genotype of this pattern? ____
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Name _____________________
Period 1 2 3 4 5 6 7 8
Co-dominant Genetics
_______________: They are BOTH DOMINANT. Each allele expresses its own
phenotype.
1. Together we will complete the Punnett

Square below.
Notice that we are talking about feathers so

we use a F and super script the color using a CAPITOL LETTER TO SHOW ITS DOMINANT.
F F or F F or F F
W W B B B W
Parents genotype : _______________________

Parents phenotype: ________________________
Offspring’s genotype (include %’s):

__________________________________
Offspring’s phenotype (include %’s):
__________________________________
2. A Sneetch can have curly hair, spiked hair, or a mix of both curly &
spiked. Here are the alleles for a Sneetch’s hair: Curly H , Spiked H
C S
What would the genotype be of a Sneetch that has curly & spiked
hair? _________________
Create a Punnett Square of a cross between a curly haired Sneetch &
a spiked haired Sneetch.
Offspring’s genotype (include %’s):

_________________________________________
Offspring’s phenotype (include %’s):
_________________________________________
3. A family of Sneetches have figured out that only 50% of their children will have
beautiful curly (but not spiked) hair! What must the genotypes of the parents be?
Set up a Punnett Square to solve this Sneetchy mystery!
Parents genotypes ____ x ____

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4. In a certain fish, blue scales (S ) and red scales (S ) are
B R
codominant. When a fish has the hybrid genotype, it has a patchwork

of blue and red scales.
a. What is the genotype for blue fish? ______________
b. What is the genotype for red fish? ______________
c. What is the genotype for patchwork fish? ___________
What happens if you breed a patchwork fish with a fish that only has
Blue Scales? Set up a punnett square to help you answer the questions.
a. What is the probability of having fish

with red scales? ________%
b. What is the probability of having fish with
patchwork scales? _________%
5. Two patchwork fish are crossed. Set up a punnett square to help you answer
the questions.
a. What is the probability that they will have patchwork

fish? _______________%
b. What is the probability that they will have fish with red
scales? _______________%
6. A patchwork fish is crossed with a fish with only red scales. Set up a
punnett square to help you answer the questions.
a. What is the probability that they will have patchwork

fish? _______________%
b. What is the probability that they will have fish with red
scales? _______________%
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30 1/2
Name _____________________
Period 1 2 3 4 5 6 7 8
Do You Want To Build A

Snowman?
Use the chart about Snowman to answer the questions below.
1. Some of the traits in the chart are not simple cases of dominant and recessive. List
those traits that show both phenotypes for their genotypes. (Co-Dominant
genetics)
a. ______________________________________
b. ______________________________________
c. ______________________________________
d. ______________________________________
e. ______________________________________
2. What are the genotype(s) of the following phenotypes?

a. Long nose:
b. Top Hat:
c. No Pipe:
d. Joyful Mouth:
e. Three Branches: _________
f. Skinny Snowball: __________
3.What are the phenotype of the following genotypes?
a.TT:
b.WW:
c.S S :
S S
d.M M :
B W
e.Jj:
f.B B :
S S
4. If Franny’s father was a homozygous long nose(_________), and her mother was a
short nose(________), what is Franny’s genotype if she has a long nose?_______
a. Set up a Punnett Square(s) to show your work.
b. List all of the genotypes & phenotypes of their offspring.
5. In the last question, you figured out Franny’s nose genotype. (_______) Frosty
and Franny are expecting a new little snowflake! Frosty, who is a homozygous short
nose snowman, is hoping that his new little snowflake will look like his mother,
Franny!
a. Set up a Punnett Square to show the possible genotypes of their little
snowflake!
b. List all of the genotypes & phenotypes of their offspring.
c. What is their new snowflake’s genotype possibilities?
_____________________
d. Could their new little snowflake have a long nose? Yes OR No
6. Another snowman Snowy brags that the snow drift his family comes from is a pure
line of coal eyed snowpeople… He marries a snowgirl, Blizzard, who has the cutest
little button eyes in the entire winter wonderland! How many of their children will
be able to brag that they have coal eyes like their father?
a. Set up a Punnett Square to show your work.
b. List all of the genotypes & phenotypes of Snowy & Blizzard’s offspring
possibilities.
c. Could any of their offspring have homozygous coal eyes? Yes OR No
7. Use the chart at your lab table to make your own snowperson! Flip 2 coins for each trait
&
see what you get! Heads is a DOMINANT TRAIT, tails is a recessive trait. Place your
phenotype & genotype in the chart below and then draw your snow person using the pictures in
the chart to guide you.
Trait Genotype Phenotype Trait Genotype Phenotype
Height Mouth Shape
Type & # of
Diameter of
Buttons on
Largest Snowball
Snowman
# of Branches on
# of Snowballs
Arms
Scarf Carrot Nose Length
Top Hat
Earmuffs
Eyes Corn Cob Pipe
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GENETICS WORKBOOK 2021-22

RR: Heterozygous or Homozygous gg: Heterozygous or Homozygous Hh:Purebred or Hybrid

In Monsters the following traits are dominant and recessive.

2. Write all possible genotypes next to the descriptions.

a. TT ______________ Tt ______________ tt ______________

4. Tt x TT ______________ % of the offspring that has two eyes

______________ % of the offspring that has green skin

______________ % of the offspring that has rough coat

______________ % of the offspring that has horns

8. Cross a heterozygous two-eyed monster with one-eyed monster.

____________________________ % Genotype of the offspring

9. Cross a homozygous green monster with a blue monster.

__________________________ % Genotype of the offspring

10. Cross two heterozygous horned monsters.

_____________________ % Genotype of the offspring

Should this dog be called “SPOT”?

Chromosome from the female dog

Chromosome from the male dog

Trait Dominant Gene Recessive Gene

Hair length Long (L) Short (l)

Hair texture Bristly (B) Silky (b)

Hair curliness Curly (C) Straight (c)

Coat pattern Spotted (S) Solid (s)

1. Would the new puppy have a spotted coat? ____________

Genotype for offspring Phenotype for offspring

6. What is the phenotype of the mom? __________________________

PTC Punnett Square

1. What is your genotype? (or __________)

3. What are your parents’ possible phenotypes? List all possibilities:

4. If you’re a Taster, do both of your parents have to be Tasters? Yes or No

Punnett Square Practice: Minion Genetics

Phenotypes are ______________________________________________________________________.

two eyes EE combed hair sprout hair Hh hh one eye ee

sprout hair Hh EE one eye ee two eyes hh combed hair

Predicting the Outcome:

What is the genotype of the mom? _______

What is the genotype of the dad? _______

What is the percent chance of having a short baby? _______

What is the percent chance of having a homozygous tall baby? _______

What is the percent chance of having a heterozygous tall baby? _______

Fruit Fly Punnett Squares Worksheet

A. Possible genotypes of F1 offspring: __________________________

A. Possible genotypes of F2 offspring: __________________________

A. Possible genotypes of F1 offspring: __________________

A. Possible genotypes of F2 offspring: __________________________

A. Possible genotypes of F1 offspring: _____________________

F2 Generation results: 120 curly wing and 0 normal wing offspring.

F2 generation results: 61 curly wing and 57 normal wing offspring.

Name: _______________________ Period: 1 2 3 4 5 6 7 8

Pea Plant Punnett Squares Worksheet

Possible genotypes of offspring: __________________________

Possible genotypes of offspring: __________________________

Possible genotypes of offspring: __________________________

Possible genotypes of offspring: __________________________

Possible genotypes of offspring: __________________________

Possible genotypes of offspring: __________________________

___________________: Genes that are neither dominant nor recessive

a. Genotypes of parent plants _____& _____

a. TT Tt tt __

a. Genotypes of parent plants _& _

a. Genotypes of parent plants _ &

a. Genotypes of parents _&

a. Genotypes of parents _ & __

a. Genotypes of parents _ & __

a. Genotypes of parent chickens _&

a. Genotypes of parents _ & __

a. Genotypes of parents _ & __

Name__________ Class period_

Phenotype_ ______

Name _ ____

Parents genotypes x