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WorksheetsMonohybrid Crosses and Dominance Types
Total questions: 12
Worksheet time: 9mins
Name
Class
Date
1.
Who is the father of genetics?
a)
Charles Darwin
b)
Gregor Mendel
c)
Dimitri Mendeleev
d)
Hans Krebs
2.
An organism with two different alleles for a trait is said to be:
a)
recessive
b)
hybrid
c)
dominant
d)
purebred
3.
Recessive alleles are written using
a)
capital
b)
lowercase
c)
both
d)
neither
4.
Which of the following is a genotype?
a)
long hair
b)
blue eyes
c)
Gg
d)
tall
5.
Aa is an example of
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
d)
none of these
6.
bb is an example of
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
d)
none of these
7.
Purple is dominant to white. A heterozygous purple flower is crossed with a white flower. What are the genotypes and phenotypes of the offspring?
a)
100% Pp (purple)
b)
50% Pp (purple); 50% pp (white)
c)
75% Pp (purple); 25% pp (white)
d)
25% PP, 50% Pp, 25% pp
75% purple, 25% white
75% purple, 25% white
8.
Tall is dominant to short. A homozygous tall plant is crossed with a short plant. What will be the phenotypes of the offspring?
a)
100% tall
b)
50% tall, 50% short
c)
75% tall, 25% short
d)
25% tall, 75% short
9.
Green is dominant to yellow. Two heterozygous green plants are crossed. What are the genotypes of the offspring?
a)
100% Gg
b)
50% GG, 50% Gg
c)
25% GG, 50% Gg, 25% gg
d)
75% Gg, 25% gg
10.
A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?
a)
Incomplete Dominance
b)
Co dominance
c)
Independent assortment
d)
Recessive inheritance
11.
A breed of chicken shows codominance for feather color. One allele codes for black feathers, another codes for white feathers. The feathers of heterozygous chickens of this breed will be:
a)
all black
b)
all white
c)
all gray
d)
speckled black and white
12.
In chickens, feather color is codominant. If a black chicken BB is mated with one that is black and white (BW) what are the chances of having a chicken that is black and white?
a)
50%
b)
0%
c)
25%
d)
100%
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