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WorksheetsMonohybrid Quiz
Total questions: 15
Worksheet time: 59mins
Name
Class
Date
1.
Round seeds (R) are dominant over wrinkled seeds (r). What percentage of the offspring will be round from the following cross?
Rr X Rr
Rr X Rr
a)
100%
b)
75%
c)
50%
d)
25%
2.
Round seeds (R) are dominant over wrinkled seeds (r). What percentage of the offspring will be round from the following cross?
RR X Rr
RR X Rr
a)
100%
b)
75%
c)
50%
d)
25%
3.
A tall pea plant (TT) is crossed with a short pea plant (tt). What percentage of the offspring will be tall?
a)
100%
b)
75%
c)
50%
d)
25%
4.
A heterozygous round seeded plant (Rr) is crossed with a homozygous dominant round seeded plant (RR). What percentage of the offspring will be homozygous dominant?
a)
100%
b)
75%
c)
50%
d)
25%
5.
A homozygous dominant round seeded plant is crossed with a homozygous recessive wrinkled seeded plant. What are the genotypes of the parents?
a)
RR X rr
b)
Rr X rr
c)
rr X rr
d)
RR X Rr
6.
A homozygous round seeded plant is crossed with a homozygous wrinkled seeded plant. What percentage of the offspring will be homozygous recessive?
R = round
r = wrinkled
R = round
r = wrinkled
a)
75%
b)
50%
c)
25%
d)
0%
7.
In guinea pigs, the allele for short hair is dominant over the allele for long hair.
B = short
b = long
What genotype would a heterozygous short haired guinea pig have?
B = short
b = long
What genotype would a heterozygous short haired guinea pig have?
a)
BB
b)
bb
c)
Bb
8.
In guinea pigs, the allele for short hair is dominant over the allele for long hair.
B = short
b = long
What genotype would a homozygous recessive guinea pig have?
B = short
b = long
What genotype would a homozygous recessive guinea pig have?
a)
BB
b)
bb
c)
Bb
9.
In guinea pigs, the allele for short hair is dominant over the allele for long hair.
B = short
b = long
A purebred short haired guinea pig is crossed with a long haired guinea pig. What percentage of their offspring will have short hair?
B = short
b = long
A purebred short haired guinea pig is crossed with a long haired guinea pig. What percentage of their offspring will have short hair?
a)
100%
b)
75%
c)
50%
d)
25%
10.
In guinea pigs, the allele for short hair is dominant over the allele for long hair.
B = short
b = long
What would the cross be for two heterozygous guinea pigs?
B = short
b = long
What would the cross be for two heterozygous guinea pigs?
a)
BB X BB
b)
BB X Bb
c)
Bb X Bb
d)
bb X bb
11.
Smooth seeds are dominant over wrinkled seeds.
What is the genotype ratio for the following cross?
Nn X NN
What is the genotype ratio for the following cross?
Nn X NN
a)
NN = 100%, Nn = 0%, nn = 0%
b)
NN = 50%, Nn = 25%, nn = 25%
c)
NN = 50%, Nn = 50%, nn = 0%
d)
NN = 25%, Nn = 50%, nn = 25%
12.
G = green g = yellow
Cross two plants that are heterozygous for green pods.
What is the phenotype ratio?
Cross two plants that are heterozygous for green pods.
What is the phenotype ratio?
a)
25% green, 75% yellow
b)
25% green, 75% yellow
c)
50% green, 50% yellow
d)
75% green, 25% yellow
13.
Tomato plants usually have hairy stems. Hairless stems are present in tomato plants that are homozygous recessive for this trait. If the stem characteristics are determined by a single gene, what are the expected phenotype percentages for the offspring of a heterozygous hairy plant and a hairless plant?
a)
100% hairy, 0% hairless
b)
75% hairy, 25% hairless
c)
50% hairy, 50% hairless
d)
25% hairy, 75% hairless
14.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
15.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
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