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Genetics and Blood Type Review

Total questions: 20

Worksheet time: 20mins

Name
Class
Date
1.

Which of the following would be considered homozygous recessive

a)

AA

b)

Aa

c)

aa

d)

AaA

2.

Which of the following is considered heterozygous?

a)

AA

b)

Aa

c)

aa

d)

AaA

3.

___________are different forms of the same gene that are always found on the same position of two homologous chromosomes.

a)

alleles

b)

chromatids

c)

phenotypes

d)

genotypes

4.

During fertilization, offspring receive ______ allele(s) from each parent for a trait

a)

4

b)

3

c)

2

d)

1

5.

What is a genotype?

a)

alternative form of a gene

b)

the physical characteristics of a trait

c)

specific set of genes for a trait

d)

the study of biological inheritance

6.

What is a phenotype?

a)

alternative form of a gene

b)

the physical characteristics of a trait

c)

specific set of genes for a trait

d)

the study of biological inheritance

7.

What is the purpose of a Punnett square?

a)

To predict how many offspring will be produced

b)

To track traits through family generations

c)

To investigate blood types

d)

To predict the probability of what type of offspring can be produced

8.

What is the purpose of a pedigree?

a)

To predict how many offspring will be produced

b)

To track traits through family generations

c)

To investigate blood types

d)

To predict the probability of what type of offspring can be produced

9.

which combination would produce a 1:2:1 ratio of genotypes and a 3:1 ratio of phenotypes?

a)

AA x aa

b)

AA x AA

c)

Aa x Aa

d)

aa x aa

10.

In a dihybrid cross, what is the ratio for phenotype between organisms that are heterozygous for both traits (RrYy)

a)

1:2:1

b)

9:3:3:1

c)

3:1

d)

4:2:2:1

11.

What is the probability that a homozygous recessive offspring will be produced between two heterozygous parents?

a)

100%

b)

75%

c)

50%

d)

25%

12.

50% of the offspring are heterozygous and the other 50% are homozygous recessive; what are the genotypes of the parents?

a)

Rr x rr

b)

RR x rr

c)

Rr x Rr

d)

RR x Rr

13.

If one of your parents is heterozygous for blood type A and the other is homozygous for type B, what are the possible blood types you could be ?

a)

AB or B

b)

AB, B, or O

c)

AB or O

d)

AB, B, or A

14.

The father is type A and the mother is type B. Both have the recessive allele for blood type O. What is the probability that these parents will have offspring with type A blood?

a)

100%

b)

75%

c)

0%

d)

25%

15.

BB produces black feathers, WW produces white feathers, and BW produces black and white feathers. This is an example of

a)

incomplete dominance

b)

codominance

c)

heterozygous dominance

d)

genetic mutation

16.

 A bean plant with a GG genotype is crossed with a second plant that has the gg genotype. What is the probability that the offspring will show the dominant trait?

a)

0%

b)

25%

c)

75%

d)

100%

17.

In a pedigree, which shape represents a male?

a)

circle

b)

square

c)

star

d)

triangle

18.

In a pedigree, which shape represents a female?

a)

circle

b)

square

c)

star

d)

triangle

19.

In a pedigree, how would an affected female be represented?

a)

there would be a * by the circle

b)

the circle would be underlined

c)

the circle would be shaded in

d)

the circle would be highlighted

20.

Which of the following would be considered homozygous dominant?

a)

AA

b)

Aa

c)

aa

d)

AaA