WorksheetsPunnett Square Practice (3/19)
Total questions: 12
Worksheet time: 14mins
Name
Class
Date
1.
A brown cat (BB) has a litter of kittens with a white cat (bb). What percent of their kittens will be brown?
a)
10%
b)
25%
c)
75%
d)
100%
2.
What genotype would be in the box with the question mark?
a)
Aa
b)
AA
c)
aa
d)
AB
3.
Mom is heterozygous and has brown eyes. Dad is homozygous recessive for blue eyes. What percent of their children will have blue eyes?
a)
100%
b)
25%
c)
50%
d)
75%
4.
Heterozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
5.
G = green, g = yellow
The genotype for a yellow plant is...
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
6.
Which of the following alleles is homozygous (purebred) recessive?
a)
Tt
b)
tt
c)
TT
d)
t
7.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
8.
What is the probability of heterozygous offspring?
a)
25%
b)
50%
c)
0%
d)
100%
9.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
10.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
11.
What is the phenotype of the offspring? (A-Brown hair; a-blond hair)
a)
50 % Brown Hair and 50% Blond Hair
b)
25 % Brown Hair and 75% Blond Hair
c)
75 % Brown Hair and 25% Blond Hair
d)
0% Brown Hair and 100% Blond Hair
12.
A green pea plant (GG) is being crossed with a green pea plant (Gg). What is the phenotype?
a)
100 % rainbow
b)
50% yellow and 50% green
c)
100% green
d)
100% yellow
100 %
