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Mendelian Genetics Quiz

Total questions: 20

Worksheet time: 5hrs 0mins

Name
Class
Date
1.

An allele that is only expressed if the organism is homozygous for the trait. These alleles can be masked by other alleles.

a)

phenotype

b)

genotype

c)

dominant

d)

recessive

2.

An allele with the ability to mask another allele, represented with a capital letter (ex: B)

a)

phenotype

b)

genotype

c)

dominant

d)

recessive

3.

An organism’s combination of alleles, written with 2 letters (ex: BB, Bb, or bb)

a)

phenotype

b)

genotype

c)

dominant

d)

recessive

4.

An organism’s physical expression of its genes (ex: brown hair, tall, freckled)

a)

phenotype

b)

genotype

c)

dominant

d)

recessive

5.

If an organism has 2 different alleles for a trait, it is known as _____ or a _____.

Choose the 2 terms that apply.

a)

heterozygous

b)

homozygous

c)

purebred

d)

hybrid

6.

If an organism has 2 identical alleles for a trait, it is known as _____ or a _____.

Choose the 2 terms that apply.

a)

heterozygous

b)

homozygous

c)

purebred

d)

hybrid

7.

States that genes for different traits are inherited independently of one another. (ex:pea color and pea shape)

a)

Law of Dominance

b)

Law of Independent Assortment

c)

Law of Segregation

8.

States that the two alleles for a trait separate during gamete formation and that a parent will pass down one allele at random to their offspring.

a)

Law of Dominance

b)

Law of Independent Assortment

c)

Law of Segregation

9.

In rabbits, brown fur color is dominant to white fur color. Which of the following genotypes will result in brown fur?

Choose all that apply.

a)

BB

b)

bb

c)

Bb

10.

In rabbits, brown fur color is dominant to white fur color. Which of the following genotypes will result in white fur?

Choose all that apply.

a)

BB

b)

bb

c)

Bb

11.

In rabbits, brown fur color is dominant to white fur color. A heterozygous brown rabbit mates with a white rabbit. Which of the following represents the cross of the two parents?

a)

BB x bb

b)

Bb x bb

c)

bb x bb

d)

Bb x Bb

12.

When the Punnett Square is completed, which of the following would be in box #1?

a)

B

b)

BB

c)

Bb

d)

bb

13.

When the Punnett Square is completed, which of the following would be in box #2?

a)

B

b)

b

c)

Bb

d)

bb

14.

When the Punnett Square is completed, which of the following would be in box #3?

a)

B

b)

b

c)

Bb

d)

bb

15.

When the Punnett Square is completed, which of the following would be in box #4?

a)

B

b)

b

c)

Bb

d)

bb

16.

Which of the following shows the ratio of brown:white rabbits for the offspring of this cross?

a)

1:1

b)

1:4

c)

3:1

d)

4:0

17.

Complete the Punnett Square Shown and answer the following questions. Based on the Punnett Square, what percentage of the offspring of this cross would be expected to be brown?

a)

0%

b)

25%

c)

50%

d)

100%

18.

Complete the Punnett Square Shown and answer the following questions. Based on the Punnett Square, what percentage of the offspring of this cross would be expected to be white?

a)

0%

b)

25%

c)

50%

d)

100%

19.

What is the probability ratio that their offspring will have yellow and smooth peas?

a)

1:16

b)

3:16

c)

9:16

d)

12:16

20.

What is the probability ratio that their offspring will have green and wrinkled peas?

a)

1:16

b)

3:16

c)

4:16

d)

9:16