Heredity Test Practice Questions With Answer Key (Page 3 of 5) in pdf

Heredity Test Practice Questions With Answer Key Page 3

parent is a carrier, what is the probability that their

13. In people, brown hair (B) is dominant over red

child will have sickle-cell anemia?

hair (b). If a husband is Bb and his wife is bb, what

is the probability that their first baby will have red

Hint: Make a Punnett Square below to help you.

hair? Hint: Make a Punnett Square below to help

you.

A. 75%

B. 50%

B. 25%

C. 25%

C. 100%

D. 100%

D. 50%

12. The pedigree below shows the inheritance of

sickle-cell anemia in a particular family. The shaded

14. Examine the pedigree below.

symbols represent individuals with sickle-cell

anemia.

If curly hair (C) is a dominant trait, what are the

genotypes of the parents in the pedigree?

Sickle-cell anemia is a genetic disorder of the blood

One parent is heterozygous (Cc) for the curly

in which the shape of red blood cells is distorted,

hair trait, and the other parent is homozygous

resulting in a variety of health problems. The gene

for the curly hair trait (CC).

copy for normal blood cell production (H) is

dominant to the gene copy for sickle cell production

(h). Which of the following is true about the parents

One parent is homozygous for the curly hair

highlighted in red?

trait (CC), and the other parent is

The father is homozygous dominant (HH) and

homozygous for non-curly hair (cc).

the mother is homozygous recessive (hh).

Both parents are heterozygous (Cc) for the

Each parent is heterozygous (Hh) for sickle-

curly hair trait.

cell anemia.

Both parents are homozygous (CC) for the

Each parent is homozygous recessive (hh) for

curly hair trait.

sickle-cell anemia.

Each parent is homozygous dominant (HH)

15. Having smooth seeds is a dominant trait. Having

for sickle-cell anemia.

wrinkled seeds is a recessive trait. The offspring of

two plants with wrinkled seeds will have

A. wrinkled seeds.

B. either, but wrinkled are more likely.

C. round seeds.

D. either, but round are more likely.

Heredity Test Practice Questions With Answer Key Page 3

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