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Worksheets

Mendelian and Non-Mendelian Genetics

Total questions: 15

Worksheet time: 15mins

Name
Class
Date
1.

A father that has blood type O is crossed with a blood type O mother. What will be the genotype of the offspring?

a)

50% AB; 50% OO

b)

25% AB,  25% AO, 25% BO, 25% OO

c)

25% AA, 25% BB, 25% AB, 25% OO

d)

100% OO

2.

What is the probability that any of their offspring will have hemophilia?

a)

4/4

b)

3/4

c)

2/4

d)

1/4

3.

What genotype would go in box 2?

a)

BB

b)

Bb

c)

bb

4.

What are the possible alleles a parent with the GgBb genotype could donate to their gametes? (Hint: F.O.I.L.)

a)

GB, Gb, gB, gb

b)

GB, GB, gb, gb

c)

Gb, Gb, Gb, GB

d)

GG, BB, gg, bb

5.

Round (R) and yellow (Y) are dominant traits. Based off this Punnett square, what fraction of the offspring will have wrinkled, yellow seeds?

a)

9/16

b)

3/16

c)

1/16

d)

16/16

6.

Black fur in mice (B) is dominant to brown fur (b).

Short tails (T) are dominant to long tails (t).

What percentage of the offspring of the cross BbTt x BBtt will have black fur and long tails?

a)

0%

b)

25%

c)

50%

d)

100%

7.

What is the phenotypic ratio of a dihybrid cross of 2 heterozygous parents?

a)

3:4:3:6

b)

1:2:3:4

c)

9:3:3:1

d)

8:4:3:1

8.

Heterozygous is when...

a)

the alleles are the same

b)

the alleles are different

c)

the alleles are absent

d)

the alleles are present

9.

In a heterozygous genotype, the ___________ allele takes over in the phenotype.

a)

recessive

b)

dominant

c)

lower case letter

d)

both 

10.

G = green, g = yellow
The genotype for a yellow plant is...

a)

GG

b)

Gg

c)

gg

d)

all of the choices result in yellow

11.

B = brown fur  b = white fur
In the punnett square, what is the probability for white fur? 

a)

0%

b)

25%

c)

50%

d)

75%

12.

Which of the following alleles is homozygous (purebred) recessive?

a)

Tt

b)

tt

c)

TT

d)

t

13.

In Mendelian genetics, what is the expected phenotypic ratio of a monohybrid cross between two heterozygous individuals?

a)

1:1

b)

3:1

c)

9:3:3:1

d)

1:2:1

14.

Which of the following is an example of non-Mendelian inheritance?

a)

Incomplete dominance

b)

Law of Segregation

c)

Law of Independent Assortment

d)

Dominant-recessive inheritance

15.

In a dihybrid cross between two heterozygous parents (AaBb x AaBb), what is the probability of obtaining an offspring with the genotype Aabb?

a)

1/16

b)

3/16

c)

1/8

d)

1/4