Heredity Test Practice Questions With Answer Key (Page 2 of 5) in pdf

Heredity Test Practice Questions With Answer Key Page 2

6. If a woman has brown eyes with the recessive

9. The round pea seed trait is dominant over the

gene for blue eyes (Bb), each of her sex cells will

wrinkled pea seed trait. If the phenotype of a pea

have

seed is wrinkled, which combination of genes must

it have?

A. the gene for brown eyes (B).

A. two round genes

B. one gene or the other, B or b.

B. two wrinkled genes

C. the same genes she does (Bb).

C. one round gene only

D. the gene for blue eyes (b).

D. one wrinkled gene only

7. In a certain breed of cats, having black hair is the

result of two dominant alleles for hair color (HH).

10.

The heterozygous genotype (Hh) produces a cat that

has black and white spots. Having two recessive

(hh) genes results in a white-haired cat. The Punnett

square below shows the results of a cross between

which two cats?

H HH HH

h Hh Hh

A. a spotted cat and a white cat

Look at the pedigree chart above. The squares are

B. two spotted cats

the male members of the family, and the circles are

C. two black cats

the female members of the family.

D. a black cat and a spotted cat

Squares or circles that are all black are nearsighted

members. Squares or circles that are all white have

normal vision. Squares or circles that are part black

8. The pedigree below shows the inheritance of

are family members who carry the gene for

sickle-cell anemia, a genetic disease, in a particular

nearsightedness but are not nearsighted.

family. The shaded symbols represent individuals

with sickle-cell anemia.

How many individuals in Generation II of the

family have the gene for nearsightedness?

A. 3

B. 2

C. 6

D. 5

The father in generation I has sickle-cell anemia.

11. Sickle-cell anemia is a genetic disorder of the

How many of his children have sickle-cell anemia?

blood in which the shape of red blood cells is

A. 4

distorted, resulting in a variety of health problems.

B. 3

The allele for normal blood cell production (H) is

C. 1

dominant to the allele for sickle cell production (h).

D. 2

If one parent has sickle-cell anemia and the other

Heredity Test Practice Questions With Answer Key Page 2

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