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Genetics Review

Total questions: 25

Worksheet time: 13mins

Name
Class
Date
1.

Which represents a recessive allele?

a)

A

b)

B

c)

C

d)

d

2.

Which is homozygous dominant?

a)

BB

b)

Bb

c)

bb

d)

Bw

3.

How would you describe the genotype Gg?

a)

Homozygous dominant

b)

Homozygous recessive

c)

Heterozygous

d)

Green

4.

What is the physical representation of a gene?

a)

Phenotype

b)

Genotype

c)

Homozygous

d)

Heterozygous

5.

If a man is homozygous dominant for free ear lobes, could he have a child with attached ear lobes (without mutation)?

a)

Yes

b)

No

c)

Maybe

d)

6

6.

What is it called when two alleles are dominant and phenotype is a mixture of the two alleles?

a)

incomplete dominance

b)

codominance

c)

sex-linked

d)

dominant/recessive

7.

If two heterozygous parents have a child, what is the probability the child will be Bb?

a)

0

b)

25

c)

50

d)

75

8.

Two black cows have a calf. One parent was homozygous dominant and the other was heterozygous. What are the possible genotypes of the calf?

a)

100% black

b)

50% black 50% brown

c)

100% BB

d)

50% BB 50% Bb

9.

A heterozygous green plant and a yellow plant produce a seed. What are the chances the plant is yellow?

a)

0%

b)

25%

c)

50%

d)

75%

10.

A red bull and a white cow reproduce via codominance. What color will the calf be?

a)

White

b)

Red

c)

Brown

d)

Roan

11.

If a blue flower and a yellow flower create a seed with incomplete dominance, what will the new plant look like?

a)

Blue and yellow

b)

Green

c)

Yellow

d)

Blue

12.

A roan horse fertilizes a white horse. What will be the genotype possibilities of the colt?

a)

50% RW 50% WW

b)

50% RR 50% RW

c)

100% RW

d)

75% RW 25% WW

13.

If a man is colorblind (sex-linked) and his wife is a carrier, what are the chances of their child being colorblind?

a)

0%

b)

25%

c)

50%

d)

75%

14.

What inheritance pattern could lead to a dark brown horse and a cream horse giving birth to a tan horse?

a)

incomplete dominance

b)

codominance

c)

dominant/recessive

d)

sex-linked

15.

If a purple and white spotted flower and a white flower produce a seed, what are the chances the flower will be spotted?

a)

0%

b)

25%

c)

50%

d)

75%

16.

A woman has hemophilia, a sex-linked trait. If the father does not have hemophilia, what are the odds their child has the disease?

a)

0%

b)

25%

c)

50%

d)

75%

17.

A white rabbit is born to two brown rabbit parents. What are the genotypes of the parents?

a)

BB and Bb

b)

BB and bb

c)

bb and Bb

d)

Bb and Bb

18.

If a woman heterozygous for type A blood and a man heterozygous for type B blood have a child, what are the possible blood types of the child?

a)

A or B

b)

A, B, or AB

c)

A, B, AB, or O

d)

Impossible to tell

19.

A child was born with type O blood, but parents were both type A. What were the parents' genotypes?

a)

ii and Ai

b)

AA and AA

c)

Ai and Ai

d)

AA and ii

20.

A boy is born colorblind, a sex-linked trait. From whom did he inherit this disorder?

a)

his mother

b)

his father

c)

both

d)

neither

21.

Genes from one organism are removed and added to the genome of another in_____________.

a)

Selective breeding

b)

Artificial selection

c)

Natural Selection

d)

Transgenics

22.

How many different phenotypes can result from a white flower and a red flower through incomplete dominance?

a)

1

b)

2

c)

3

d)

4

23.

Sex-linked disorders are much more common in ____.

a)

males

b)

females

c)

children

d)

adults

24.

If a heterozygous blue fish mates with a yellow fish and the inheritance pattern is dominant/recessive, What percentage of their babies will be yellow?

a)

0

b)

25

c)

50

d)

75

25.

A _________ shows how a certain trait is passed down through generation.

a)

Gene

b)

Purina

c)

Pedigree

d)

Family tree