Revision+worksheet+gr7+.sem3 Biology
Revision+worksheet+gr7+.sem3 Biology
Revision+worksheet+gr7+.sem3 Biology
1
Al Rowad International School Science Department (7-12)
School year 2021 – 2022
2
Al Rowad International School Science Department (7-12)
School year 2021 – 2022
6. The sickle cell version of the gene that causes sickle cell
disease is recessive. Suppose that two parents with no
symptoms have a child with sickle cell disease. What genes
did the child inherit from the parents?
a. The child must have inherited the sickle cell gene from
their mother and the normal gene from their father.
b. The child must have inherited the normal gene from their
mother and the sickle cell gene from their father
c. The child must have inherited sickle cell genes from both
parents.
d. The child must have inherited normal genes from both
parents.
3
Al Rowad International School Science Department (7-12)
School year 2021 – 2022
8. hydra develops as a bud of the parent. The buds break off, and the
young hydra are clones of the parent organism. What kind of
reproduction is this?
a. sexual
b. asexual
c. genetic
d. mother-daughter cells
III. Matching.
One mouse has the gene for black fur color and the other mouse has
the gene for white fur color.
Match the ways that the white and black fur alleles could interact.
B. black
IV. True allele
or false. 2.all gray offspring
dominant
1. (
C. white allele 3.all black and )A
dominant white offspring