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Genetics/Punnett Squares

Total questions: 20

Worksheet time: 14mins

Name
Class
Date
1.

PHENOTYPE is

a)

the genetic make-up of an organism

b)

the physical trait of an organism

c)

nucleic acid

d)

Aa

2.

Which of the following are PHENOTYPES?

a)

green skin

b)

Aa

c)

homozygous recessive

d)

purple eyes

e)

black fur

3.

Which of the following are PHENOTYPES?

a)

green skin

b)

Aa

c)

homozygous recessive

d)

purple eyes

e)

black fur

4.

The prefix "homo" means

a)

different

b)

same

c)

tomorrow

d)

never

5.

The prefix "hetero" means

a)

different

b)

ugly

c)

fancy

d)

same

6.

Which of the following represents alleles for the homozygous dominant genotype?

a)

Aa

b)

aa

c)

AA

7.

Which of the following represents alleles for the homozygous recessive genotype?

a)

Aa

b)

aa

c)

AA

8.

Which of the following represents alleles for the heterozygous genotype?

a)

Aa

b)

aa

c)

AA

9.

If A = red fur and a = white fur, what color fur would Aa be? (Assume Mendelian inheritance)

a)

red

b)

white

c)

purple

d)

blue

10.

If A = red fur and a = white fur, what color fur would AA be? (Assume Mendelian inheritance)

a)

red

b)

white

c)

purple

d)

blue

11.

If A = red fur and a = white fur, what color fur would aa be? (Assume Mendelian inheritance)

a)

red

b)

white

c)

purple

d)

blue

12.

If A = red fur and a = white fur, what are the PHENOTYPIC ratios of the offspring based on the Punnett Square?

a)

25% heterozygous

b)

50% purple

c)

75% red fur and 25% white fur

d)

25% homozygous recessive, 50% heterozygous, 25% homozygous dominant

13.

If A = green pods and a = yellow pods, what are the GENOTYPIC RATIOS of the offspring in the Punnett square?

a)

100% green pods

b)

100% yellow pods

c)

100% heterozygous

d)

100% homozygous dominant

14.

If A = green pods and a = yellow pods, what are the PHENOTYPIC RATIOS of the offspring in the Punnett square?

a)

100% green pods

b)

100% yellow pods

c)

100% heterozygous

d)

100% homozygous dominant

15.

If A = green pods and a = yellow pods, what are the PHENOTYPIC RATIOS of the offspring of a cross between two homozygous recessive parents? (Hint: Make a Punnet Square)

a)

100% green pods

b)

100% yellow pods

c)

100% heterozygous

d)

100% homozygous dominant

16.
Which of the following is homozygous recessive?
a)
rr
b)
AA
c)
TT
d)
Ff
17.
Which of the following is homozygous dominant?
a)
Jj
b)
Rr
c)
MM
d)
ee
18.

Gretford is heterozygous. If (R) for Round head, and (r) is for Egg head, what is Gretford's genotype?

a)

RR

b)

Rr

c)

rr

d)

rR

19.

What genotype would go in box 2? And is it Homozygous or Heterozygous?

a)

BB Heterozygous

b)

Bb Heterozygous

c)

bb Homozygous

d)

Bb Homozygous

20.

What are the possible genotypes for this cross? And what percentage of each is produced?

a)

TT = 25% Tt= 50% tt=25%

b)

all tall

c)

TT= 75% tt = 25%

d)

Tt = 100%