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Punnett Squares

Total questions: 14

Worksheet time: 14mins

Name
Class
Date
1.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
2.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
3.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
4.

T - tall and t = short

In the punnett square below, what belongs in the missing square

a)

tt

b)

Tt

c)

Bb

d)

TT

5.

The genotype Aa is called . . .

a)

Homozygous recessive

b)

Heterozygous

c)

Purebred

d)

Homozygous dominant

6.

Which of the following would be a phenotype?

a)

Aa

b)

red hair

c)

heterozygous

d)

DNA

7.

Which of the following genotypes are Purebred? Select 2 answers.

a)

AA

b)

Aa

c)

aa

8.

In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any white-flowering plant resulting from this species?

a)

rr

b)

Rr

c)

RR

9.

Who is considered the "father of genetics"?

a)

Reginald Punnett

b)

Gregor Mendel

c)

James Watson

d)

Charles Darwin

10.

What are the phenotype percentages of the offspring?

(A-Brown fur color; a-white fur color)

a)

50 % Brown fur and 50% White fur

b)

25 % Brown fur and 75% White fur

c)

75 % Brown fur and 25% White fur

d)

0% Brown fur and 100% White fur

11.
AA and Aa always show up as
a)
dominant
b)
recessive
12.
aa always shows up as
a)
dominant
b)
recessive
13.
Which of the following is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
14.
Which of the following is homozygous dominant?
a)
Yy
b)
Y
c)
yy
d)
YY