wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Genetics Quiz - Heredity

Total questions: 25

Worksheet time: 19mins

Name
Class
Date
1.

What is a phenotype?

a)

possible combinations of alleles in a gene

b)

physical expression of a gene

c)

whether an allele is dominant or recessive

2.

Which of the following allele combinations is homozygous?

a)

Aa

b)

AA

3.

Which of the following allele combinations is heterozygous?

a)

Aa

b)

AA

4.

Which of following is homozygous recessive?

a)

Aa

b)

AA

c)

aa

5.

What do you call an allele that shows its trait even when only 1 copy is present?

a)

recessive

b)

hidden

c)

dominant

d)

active

6.

If black fur (F) is dominant and orange fur (f) is recessive, what is this kitten's genotype?

a)

Ff

b)

FF

c)

ff

d)

orange

e)

black

7.

A variation of a gene is called ________.

a)

a gene

b)

an allele

c)

a phenotype

d)

a chromosome

8.

Brown hair (B) is dominant to blonde hair (b). What is the probability that two parents who are both heterozygous with brown hair will have a blonde baby?

a)

0%

b)

25%

c)

75%

d)

100%

9.

How many alleles does a child receive from each parent for a specific trait?

a)

1

b)

2

c)

3

d)

4

10.

Which of the following is considered "purebred" or "true-breeding?"

a)

heterozygous

b)

homozygous

11.

Which of the following is a "hybrid?"

a)

AA

b)

Aa

c)

aa

12.

A capital letter represents a __________ allele.

a)

dominant

b)

recessive

13.

A lowercase letter represents a _________ allele

a)

dominant

b)

recessive

14.

If red flowers (R) is dominant to white flowers (r), what is the probability that two purebred red flowers (RR) will have an offspring with white flowers?

a)

0%

b)

25%

c)

50%

d)

75%

15.

What do you call an allele that only shows its trait when there are two identical copies?

a)

recessive

b)

hidden

c)

dominant

d)

active

16.

Select all the genotypes that are homozygous.

a)

aa

b)

Ee

c)

Tt

d)

GG

e)

yy

17.

What do you call the passing of genes and traits from generation to generation?

a)

genes

b)

alleles

c)

parents

d)

heredity

18.

What is name of the scientist who researched the passing of traits and is known as the father of modern genetics?

a)

Einstein

b)

Mendel

c)

Madame Curie

d)

Darwin

19.

What is a genotype?

a)

possible combinations of alleles in a gene

b)

physical expression of a gene

c)

whether an allele is dominant or recessive

20.

What is an example of a phenotype?

a)

hair color

b)

Aa

c)

shirt color

21.

Gray fur (G) is dominant to tan fur (g). If a purebred gray rabbit (GG) breeds with a purebred tan rabbit (gg), what will the genotype of 100% of their offspring be?

a)

GG

b)

Gg

c)

gg

22.

Which of following is homozygous dominant?

a)

Aa

b)

AA

c)

aa

23.

If red flowers (R) is dominant to white flowers (r), what is the probability that two purebred red flowers (RR) will have an offspring with red flowers?

a)

0%

b)

25%

c)

50%

d)

100%

24.

When one trait is not completely dominant over another and the two traits blend together, it is called _______________. Example: a red flower and a white flower produce a pink flower

a)

heredity

b)

incomplete dominance

c)

purebred

d)

hybrid

25.

What is the name of the diagram used to predict the genetic outcome of a breeding cross?

a)

Pythagorean Theorem

b)

Punnett Square

c)

Square Root

d)

Graph