Worksheetspunnett square review
Total questions: 17
Worksheet time: 13mins
Name
Class
Date
1.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
2.
In pea plants, the tall allele is dominant to the short allele. What key would demonstrate this?
a)
Tall = T
Short = S
Short = S
b)
Tall = T
Short = t
Short = t
c)
Tall = t
Short = T
Short = T
d)
Tall = TT
Short = tt
Short = tt
3.
What are the parents' genotypes?
a)
Homozygous for brown eyes
b)
Heterozygous for brown eyes
c)
Homozygous for blue eyes
d)
Heterozygous for blue eyes
4.
What is the phenotype for the recessive trait?
a)
brown eyes
b)
green eyes
c)
blue eyes
5.
What is the yellow seed genotype?
a)
aa
b)
Aa
c)
AA
d)
AA or Aa
6.
What genotype would go in box 2?
a)
BB
b)
Bb
c)
bb
7.
What genotype would go in box 3?
a)
BB
b)
Bb
c)
bb
8.
What genotype would go in box 1?
a)
BB
b)
Bb
c)
bb
9.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
10.
What are the expected phenotypes 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.
B = brown fur b = white fur
In the Punnett square, what is the probability for white fur?
In the Punnett square, what is the probability for white fur?
a)
0%
b)
25%
c)
50%
d)
75%
12.
In the Punnett square shown, what must the genotype of the missing parent be?
a)
BB
b)
Bb
c)
bb
d)
Tt
13.
What ratio of the offspring from the cross shown will be homozygous recessive for the trait of tallness?
a)
0 in 4
b)
1 in 4
c)
2 in 4
d)
4 in 4
14.
What are the possible genotypes for this cross?
(Click the picture to see it without the text)
(Click the picture to see it without the text)
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
15.
In humans, having freckles (F) is dominant to not having freckles (f). What is the percent chance that a married couple with no freckles will give birth to a child who has freckles?
a)
0%
b)
25%
c)
50%
d)
75%
e)
100%
16.
Having two different alleles for a trait is called (a) .
17.
One of the two forms of a gene is called a(n)
a)
genotype
b)
allele
c)
hybrid
d)
trait
100 %
