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    Blood Typing Problems Answer Key

    Uploaded by

    Jordan Berkstresser
    This document provides answers to blood typing problems involving determining possible blood types of offspring based on the parents' blood types. It lists the possible genotypes for the 4 main blood types (O, A, B, AB). Several examples are worked through, showing crosses between parents of different blood types/genotypes to determine the possible blood types of their children. It also explains why type O blood is called a "universal donor" and type AB a "universal acceptor".

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    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    Blood Typing Problems Answer Key

    Uploaded by

    Jordan Berkstresser
    375 views3 pages
    This document provides answers to blood typing problems involving determining possible blood types of offspring based on the parents' blood types. It lists the possible genotypes for the 4 main blood types (O, A, B, AB). Several examples are worked through, showing crosses between parents of different blood types/genotypes to determine the possible blood types of their children. It also explains why type O blood is called a "universal donor" and type AB a "universal acceptor".

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    This document provides answers to blood typing problems involving determining possible blood types of offspring based on the parents' blood types. It lists the possible genotypes for the 4 main blood types (O, A, B, AB). Several examples are worked through, showing crosses between parents of different blood types/genotypes to determine the possible blood types of their children. It also explains why type O blood is called a "universal donor" and type AB a "universal acceptor".

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    375 views3 pages

    Blood Typing Problems Answer Key

    Uploaded by

    Jordan Berkstresser
    This document provides answers to blood typing problems involving determining possible blood types of offspring based on the parents' blood types. It lists the possible genotypes for the 4 main blood types (O, A, B, AB). Several examples are worked through, showing crosses between parents of different blood types/genotypes to determine the possible blood types of their children. It also explains why type O blood is called a "universal donor" and type AB a "universal acceptor".

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 3

    Blood Typing Problems Answer Key 10/15/17, 11(49 AM

    Blood Type Problems ..KEY

    Original File : Blood Type Problems

    1. List all the possible genotypes for each of the 4 blood types:

    Type O _____OO_______

    Type A _____AA, AO_______

    Type B _____BB, BO_______

    Type AB ___AB_________

    SHOW WORK!

    2. A man with AB blood is married to a woman with AB blood. What blood types will their children be and in what
    proportion?

    1/4 AA or type A Blood


    1/4 BB or type B Blood

    1/2 AB

    3. A man who has type B blood (genotype: BB) is married to a woman with type O blood. What blood type will
    their children have?

    All will have genotype BB, and be type B Blood

    4. A woman with type A blood (genotype: AO) is married to a type B person (genotype: BO). What blood types will
    their children have?

    1/4 will by AB, type AB blood; 1/4 will be AO, or type A Blood; 1/4 will be BO, or type B blood; 1/4 will be OO, type
    O Blood

    5. A woman with type A blood is claiming that a man with type AB blood is the father of her child, who is also type
    AB. Could this man be the father? Show the possible crosses; remember the woman can have AO or AA
    genotypes.

    It is possible. The mother can be either AA or AO and still produce a child with type AB blood from that father.

    6. A man with type AB blood is married to a woman with type O blood. They have two natural children, and one
    adopted child. The children's blood types are: A, B, and O. Which child was adopted?

    https://www.biologycorner.com/worksheets/blood_type_problems_key.html Page 1 of 3
    Blood Typing Problems Answer Key 10/15/17, 11(49 AM

    The O child was adopted, even though the mother is type O, the father will contribute an A or a B allele to the
    offspring. These alleles are dominant.

    7. A person with type A blood (unknown genotype) marries a person with type O blood. What blood types are
    possible among their children. (Show 2 crosses)

    Child can be type A or type O blood.

    8. Two people, both with AB blood have four children. What blood types should the children be?

    Children will be 1/4 type A, 1/2 type AB, or 1/4 type B.

    9. A person with type B blood (genotype BO) has children with a type AB person. What blood types are possible
    among their children?

    Possible Blood Types: A, AB, B

    10. A person with type O blood is married to a person with type A blood (unknown genotype). They have 6
    children, 3 of them have type A blood, three of them have type O blood. What is the genotype of the two parents?

    The type A person myst be heteroyzous to have children who are both A and O. Parents are OO x AO

    11. A person has type B blood. What are ALL the possible blood types of his parents. Show the crosses to prove
    your answer.

    A x B ; A x AB;
    B x AB; AB x AB,
    B x O, B x B

    12. A man of unknown genotype has type B blood, his wife has type A blood (also unknown genotype). List ALL
    the blood types possible for their children. (you may need to do multiple crosses to consider the different possible
    genotypes of the parents)

    A, AB, B,O (to have a child with type O blood, parents must be heteroyzygous, both carrying the O allele

    13. Two people with type O blood have three children. How many of those three children also have type O blood?

    All will be O

    14. Why is a person with type O blood called a "universal donor"? Type O blood can donate to any blood type

    15. Why is a person with type AB blood called a "universal acceptor"? Type AB blood can receive transfusions

    https://www.biologycorner.com/worksheets/blood_type_problems_key.html Page 2 of 3
    Blood Typing Problems Answer Key 10/15/17, 11(49 AM

    from any blood type.

    https://www.biologycorner.com/worksheets/blood_type_problems_key.html Page 3 of 3

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