Heredity Worksheet With Answers Page 2
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11Questions #7-10 refer to the following situation:
Blood type in humans is determined by the type of carbohydrate present on the red blood cells.
A
B
A red blood cell may have carbohydrate A (I
), carbohydrate B (I
), or no carbohydrate (i).
Carbohydrate A and carbohydrate B are codominant to each other and both A and B are
completely dominant to the allele for no carbohydrate.
7. How many phenotypes are possible for this situation?
a. 2
b. 3
c. 4
d. 5
8. How many genotypes are possible for this situation?
a. 3
b. 4
c. 6
d. 8
9. Human blood type is an example of what type of inheritance pattern?
a. Incomplete dominance
b. Epistasis
c. Linked genes
d. Multiple alleles
10. If two recessive alleles are inherited by a person, they are said to have type “O” blood. If a type
O person and a homozygous type A person have a child, what will be the child’s phenotype?
a. A
b. O
c. AB
d. Not enough information
11. For two organisms to have a genetic relationship, which of the following must they share?
a. A common ancestor
b. Phenotypes
c. Genotypes
d. Linked genes
12. A blue-eyed (bb), blond haired (hh) female and a brown-eyed (Bb), brown haired (HH)male
decide to have a baby. What rule would be used to determine the probability that the baby will
have the genotype bbHh?
a. Addition rule
b. Multiplication rule
c. Trihybrid rule
d. Chi-squared rule
AP Biology
Heredity
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