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Punnett Square Practice

Total questions: 10

Worksheet time: 10mins

Name
Class
Date
1.

If an organism is said to have a genotype of "aa", which of the following then best describes it?

a)

Homozygous recessive

b)

Homozygous dominant

c)

Heterozygous dominant

d)

Heterozygous recessive

2.

If round seeds (R) are dominant to wrinkled seeds, which best describes a seed that's heterozygous?

a)

rr

b)

RR

c)

Rr

d)

Wrinkled

3.

Yellow flowers (Y) are dominant to white flowers. Which best describes a white flower?

a)

YY

b)

Homozygous dominant

c)

Heterozygous recessive

d)

yy

4.

Yellow flowers (Y) are dominant to white flowers. Which best describes a genotype of "Yy"?

a)

yellow

b)

Homozygous dominant

c)

Heterozygous recessive

d)

yy

5.

Based on the Punnett Square shown, what should fill in the missing box?

a)

GG

b)

Gg

c)

gg

d)

gG

6.

Based on the Punnett Square shown, what percent of the offspring will probably be a green pea?

a)

25%

b)

50%

c)

75%

d)

100%

7.

Based on the Punnett Square shown, what should go in the missing boxes?

a)

BB

b)

Bb

c)

bb

d)

white flower

8.

Based on the Punnett Square shown, what is the probability that the child will have blue eyes?

a)

0%

b)

25%

c)

505

d)

75%

e)

100%

9.

Based on the Punnett Square shown, what should go in the missing boxes?

a)

tt

b)

Tt

c)

tT

d)

TT

10.

Based on the Punnett Square shown, what best describes the alleles of missing boxes?

a)

tt

b)

Tt

c)

Homozygous dominant

d)

Heterozygous