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meiosis & heredity review

Total questions: 19

Worksheet time: 10mins

Name
Class
Date
1.

Which event is an important factor in increasing variety among sexually reproducing organisms?

a)

crossing over

b)

gene linkage

c)

tetracross

d)

mitosis

2.

The exchange of segments of DNA between the members of a pair of chromosomes __________.

a)

always produces genetic disorders

b)

is called genetic crossing

c)

acts as a source of variations within a species

d)

ensures that variations within a species never occur

3.

Which best describes the process of meiosis?

a)

occurs in body cells

b)

results in genetically identical cells

c)

produces 4 haploid gametes

d)

happens only in haploid cells

4.

At the beginning of which of these does the process of organizing and condensing DNA into its compact form take place?

a)

mitosis

b)

metaphase

c)

interphase

d)

cytokinesis

5.

What is the term for a cross that involves just one trait, such as a pod shape? Choose the correct answer.

a)

dihybrid cross

b)

homozygous cross

c)

test cross

d)

monohybrid cross

6.

In which way is human DNA organized?

a)

23 pairs of chromosomes

b)

23 pairs of autosomes

c)

total of 23 chromosomes

d)

23 pairs of sex chormosomes

7.

during which of these does the separation of homologous chromosomes occur?

a)

mitosis

b)

meiosis I

c)

meiosis II

d)

fertilization

8.

What happens to chromosomes when crossing over takes place?

a)

decrese in number

b)

produce new genes

c)

mutate in the first division

d)

exchange corresonding segments of DNA

9.

what happens to the sister chromatids in meiosis II?

a)

they duplicate

b)

they do not take part

c)

they are divided

d)

the remain together

10.

which term applies to an individual who possesses two recessive alleles for the same trait?

a)

mutated

b)

haploid for the trait

c)

heterozygous for the trait

d)

homozygous for the trait

11.

which term applies to all the genetic material contained in an individual or a species?

a)

genome

b)

genetic code

c)

epidemiology

d)

DNA fingerprint

12.

What is the probability that the offspring of a cross between a homozygous recessive parent & heterozygous parent will be homozygous recessive?

a)

1/1

b)

1/2

c)

1/4

d)

1/8

13.

If a pea plant were homozugous recessive for height, what would be the alleles represented?

a)

tt

b)

Tt

c)

tT

d)

TT

14.

What is the phenotypic ratio of a monohybrid cross between heterozygous parents?

a)

1:2:1

b)

3:1

c)

9:3:3:1

d)

1:2:2:1

15.

What us the name for a cross that examines the inheritance of 2 traits?

a)

monohybrid

b)

codominance

c)

incomplete dominance

d)

dihybrid

16.

In humans, freckles are dominant (F) & no freckles (f). How many in the punnett square shows a child who does not have freckles?

a)

1

b)

2

c)

3

d)

4

17.

a diploid cell would have ____ of each chromosome and a haploid cell would have ____ of each chromosome.

a)

two copies; one copy

b)

one copy; two copies

c)

one copy; one copy

d)

two copies; two copies

18.

what is the probability that the result of the offspring would be wild combs.

rrpp x RRPP. Wild combs are a recessive homozygous trait.

a)

0%

b)

25%

c)

50%

d)

100%

19.

If w is recessive and W is dominant what would be the genotype for generation II number 3?

a)

ww

b)

Ww

c)

WW

d)

ww