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Unit 6 Review

Total questions: 25

Worksheet time: 13mins

Name
Class
Date
1.

_________ is the passing of traits from parents to offspring.

a)

taxonomy

b)

heredity

c)

genetics

d)

metabolism

2.

Who discovered the rules of inheritance by studying pea plants? He is known as the Father of Genetics.

a)

Charles Darwin

b)

James Watson

c)

Erwin Chargaff

d)

Gregor Mendel

3.

Phenotype refers to the...

a)

physical observable trait

b)

underlying genetic makeup

4.

What is the term for the set of alleles an individual has?

a)

genotype

b)

phenotype

c)

heredity

d)

inheritance

5.

What is the term for alternate forms of a gene.

a)

alleles

b)

traits

c)

phenotypes

d)

chromosomes

6.

Which of the following genotypes is heterozygous?

a)

BB

b)

Bb

c)

bb

d)

all of these are heterozygous

7.

Tallness (T) is dominant to shortness (t) in pea plants. Which of the following shows the genotype of a short plant?

a)

TT

b)

Tt

c)

tt

d)

t

8.

Purple (P) is dominant to white (p) in particular variety of flower. Which of the following shows the genotype of a purple flower?

a)

PP

b)

Pp

c)

pp

d)

PP and Pp

9.

Look at the punnett square. What belongs in the missing box?

a)

SS

b)

Ss

c)

ss

d)

need more information

10.

A woman is heterozygous for freckles. What possible alleles could she pass onto her offspring in her gametes?

a)

H only

b)

h only

c)

H or h

11.

Imagine a cross between parents with the following genotypes: TT x tt. What percentage of their offspring will be heterozygous?

a)

0%

b)

25%

c)

50%

d)

100%

12.

Harry is a carrier for sickle cell anemia. What is his genotype?

a)

AA

b)

Aa

c)

aa

d)

need more information

13.

What mode of inheritance is displayed by the flower shown?

a)

incomplete dominance

b)

codominance

c)

multiple alleles

d)

polygenic

14.

Which pattern of inheritance displays a blend of the dominant and recessive trait in the heterozygous condition?

a)

incomplete dominance

b)

codominance

c)

multiple alleles

d)

polygenic

15.

Traits that display a continuous range of phenotypes, such as height and skin color in humans, follow which pattern of inheritance?

a)

incomplete dominance

b)

codominance

c)

multiple alleles

d)

polygenic

16.

In a certain species of housecat, there are five distinct phenotypes for fur color. Given this information, which pattern of inheritance does fur color follow?

a)

incomplete dominance

b)

codominance

c)

multiple alleles

d)

polygenic

17.

X-linked recessive traits are more common in biological ____________.

a)

males

b)

females

18.

The pedigree shown tracks an autosomal recessive trait. What are the genotypes of the parents?

a)

AA

b)

Aa

c)

aa

d)

need more information

19.

The pedigree shown tracks an autosomal recessive trait. What is the genotype of the affected individual?

a)

AA

b)

Aa

c)

aa

d)

need more information

20.

A typical human cell has ________ pairs of chromosomes.

a)

12

b)

23

c)

46

d)

80

21.

Which chromosomal abnormality describes the state of having a single copy of a chromosome instead of a chromosome pair?

a)

aneuploidy

b)

monosomy

c)

trisomy

d)

deletion

22.

Down's Syndrome is an example of a ______________.

a)

deletion

b)

inversion

c)

monosomy

d)

trisomy

23.

__________ chromosomes, contain the same genes in the same order, but have different information, depending on the parent they were inherited from.

a)

similar

b)

homologous

c)

genetic

d)

hereditary

24.

Which of the following terms refers to a failure of chromosomes to properly separate during meiosis?

a)

sister chromatids

b)

chromatin

c)

nondisjunction

d)

deletion

25.

For the monohybrid cross shown, what is the phenotypic ratio?

a)

1:3:1

b)

2:2

c)

9:3:3:1

d)

need more information