wayground logo

Free Printable Worksheets

NEW

Font size

S
M
L
XL
Worksheets

Genetics Review

Total questions: 25

Worksheet time: 19mins

Name
Class
Date
1.

What are the genotypes for a male that is a tongue roller, has no widow's peak, and has attached earlobes?

a)

TT or Tt, hh, EE

b)

Tt, Hh, ee

c)

TT, hh, Ee

d)

Tt, hh, ee

2.

What are the genotypes for a female that is a non-tongue roller, is heterozygous for widow’s peak, and has unattached earlobes?

a)

tt, Hh or HH, EE or Ee

b)

tt, HH, Ee or EE

c)

tt, Hh, Ee or EE

d)

TT, Hh, Ee or EE

3.

Two people with unattached earlobes have a child with attached earlobes. Select the correct genetic cross that shows the parents genotypes.

a)

EE x Ee

b)

Ee x Ee

c)

Ee x EE

d)

ee x ee

4.

Cross two heterozygous tongue rollers, what is the genotypic ratio?

a)

1:2:1

b)

3:1

c)

2:2

d)

1:1:1:1

5.

Cross two heterozygous tongue rollers, what is the phenotypic percentage?

a)

25%, 25%, 25%, 25%

b)

50%, 50%

c)

75%, 25%

d)

100%

6.

Use the letter B, cross a female that is heterozygous for dark eyes with a male that is homozygous for light eyes. The genotype of the female is __________.

a)

Dark Eyes

b)

BB

c)

Bb

d)

bb

7.

Use the letter B, cross a female that is heterozygous for dark eyes with a male that is homozygous for light eyes. The genotype of the male is __________.

a)

Light eyes

b)

BB

c)

Bb

d)

bb

8.

Use the letter B, cross a female that is heterozygous for dark eyes with a male that is homozygous for light eyes. What percentage of the offspring will have BB genotype?

a)

0%

b)

25%

c)

50%

d)

75%

9.

Use the letter B, cross a female that is heterozygous for dark eyes with a male that is homozygous for light eyes. What percentage of the offspring will have light eyes?

a)

0%

b)

25%

c)

50%

d)

75%

10.

Use the letter B, cross a female that is heterozygous for dark eyes with a male that is homozygous for light eyes. What percentage of the offspring will have dark eyes?

a)

0%

b)

25%

c)

50%

d)

75%

11.

Which of the following is an example of a phenotypic characteristic?

a)

Tongue roller

b)

T

c)

Tt

d)

Tt x Tx

12.

Dogs that are considered __________ have a lot of homozygous dominant or recessive traits, and are only bred with dogs similar to themselves.

a)

mutts

b)

heterozygous

c)

hybrid

d)

purebred

13.

Who is well known as the “father” of genetics?

a)

James Watson

b)

Rosalind Franklin

c)

Gregor Mendel

d)

Francis Crick

14.

Which organisms did the father of genetics study over many generations to create his ideas?

a)

Humans

b)

Trees

c)

Pea Plants

d)

Dogs

15.

Alleles are defined as __________.

a)

genes

b)

different versions of a gene

c)

different parts of a gene

d)

physical traits

16.

Genetics is the study of __________.

a)

how people look

b)

DNA replication

c)

inheritance of traits through genes

d)

the formation of a zygote

17.

In complete dominance a dominant allele __________.

a)

will not be seen

b)

is always displayed or expressed

c)

can be recessive

d)

is shown using lower-case letters

18.

Punnett squares __________.

a)

show that offspring get the majority of their traits from one parent

b)

show the possible genotypes and phenotypes of offspring

c)

give the probability of an offspring having a certain phenotype or genotype

d)

Both B & C

19.

If you crossed a homozygous red and a homozygous white flower, what color flowers would you expect to see for their offspring if the gene controlling flower color was operating by incomplete dominance?

a)

Red flowers and white flowers only

b)

flowers with areas of red and areas of white, white flowers, and red flowers.

c)

Pink flowers only

d)

pink flowers, red flowers, and white flowers.

20.

If you crossed a black-fur dog and a white-fur dog and got puppies with both black and white spots, you could assume that the cross showed what type of dominance?

a)

incomplete dominance

b)

codominance

c)

sex-linked dominance

d)

complete dominance

21.

We want to figure out if a particular fish’s color displays codominance or incomplete dominance. So, we cross a homozygous red fish “R” with a homozygous blue fish “B”. If the fish’s offspring are purple, then __________.

a)

It has to be codominance

b)

It has to be incomplete dominance

c)

It is not codominance or incomplete dominance because one allele is dominant and the other is recessive

d)

It can be incomplete dominance or codominance

22.

We want to figure out if a particular fish’s color displays codominance or incomplete dominance. So, we cross a homozygous red fish “R” with a homozygous blue fish “B”. If the fish’s offspring show areas of red and areas of blue then __________.

a)

It has to be codominance

b)

It has to be incomplete dominance

c)

It is not codominance or incomplete dominance because one allele is dominant and the other is recessive

d)

It can be incomplete dominance or codominance

23.

We want to figure out if a particular fish’s color displays codominance or incomplete dominance. So, we cross a homozygous red fish “R” with a homozygous blue fish “B”. If all of the offspring are blue or all of the offspring are red then __________.

a)

It has to be codominance

b)

It has to be incomplete dominance

c)

It is not codominance or incomplete dominance because one allele is dominant and the other is recessive

d)

Not enough information is given to determine what it is

24.

In humans, blood types are controlled by three alleles, A and B are codominant and o is recessive. A woman with blood type A has a child with a man who has blood type A as well. Which of the following would not be a possible phenotype of their child?

a)

Type A

b)

Type AB

c)

Type O

d)

There is not enough information

25.

In humans, blood types are controlled by three alleles, A and B are codominant and o is recessive. A woman with blood type A has a child with a man who has blood type B, their child has blood type O. What must be the genotypes of the parents?

a)

Ao x Bo

b)

AA x Bo

c)

Ao x BB

d)

There is not enough information