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Meiosis Assessment

Total questions: 80

Worksheet time: 40mins

Name
Class
Date
1.

_____ is a form of cell division that halves the number of chromosomes when forming specialized reproductive cells, such as gametes or spores.

a)

Binary fission

b)

Budding

c)

Meiosis

d)

Mitosis

2.

Meiosis involves _____ divisions of the nucleus--meiosis I and meiosis II.

a)

2

b)

3

c)

4

d)

0

3.

Before meiosis begins, the DNA in the original cell is _____ during the S phase. Thus, meiosis starts with duplicated chromosomes.

a)

replicated

b)

donated

c)

destroyed

d)

dissolved

4.

Meiosis starts with _____ chromosomes.

a)

homologous

b)

homeostasis

c)

heterogeneous

d)

heterotrophic

5.

Nondisjunction, the failure of chromosomes to separate properly during meiosis, can lead to _____.

a)

crossing over

b)

Down syndrome

c)

male offspring

d)

female offspring

6.

What sex chromosomes would a male have?

a)

XX

b)

XY

c)

YY

d)

OY

7.

Asexual reproduction allows organisms to produce _____ offspring in a _____ period of time, without using energy to produce gametes or to find a mate.

a)

few, long

b)

many, short

c)

many, long

d)

few, short

8.

Some multicellular eukaryotes undergo _____, a type of reproduction in which the body breaks into several pieces that can each turn into a new organism.

a)

fission

b)

fertilization

c)

fragmentation

d)

alternation of generations

9.

During _____, a parent separates into two or more individuals of about equal size.

a)

binary fission

b)

budding

c)

fertilization

d)

alternation of generations

10.

In sexual reproduction two parents each form reproductive cells (gametes) that have _____ of chromosomes of somatic cells.

a)

twice the number

b)

the diploid number

c)

the 2n number

d)

one-half

11.

An individual produced by asexual reproduction is a _____, an organism that is genetically identical to its parent.

a)

clone

b)

clown

c)

gamete

d)

recombinant

12.

In _____ a single parent passes copies of all of its genes to each of its offspring; there is no fusion of haploid cells such as gametes.

a)

asexual reproduction

b)

sexual reproduction

c)

meiosis I

d)

meiosis II

13.

A(n) _____ is created by the random joining of two gametes.

a)

zygote

b)

spore

c)

sperm

d)

egg

14.

The number of genetic combinations that can occur among gametes is _____.

a)

only a few

b)

zero

c)

practically unlimited

d)

150

15.

The random distribution of homologous chromosomes during meiosis is called _____. (In each homologous pair, is the chromosome inherited from mom or dad lining up on the left or right during metaphase I?)

a)

crossing-over

b)

independent assortment

c)

random fertilization

d)

cloning

16.

_____ is a mechanism allowing for genetic variation in organisms that reproduce sexually.

a)

crossing-over

b)

independent assortment

c)

random fertilization

d)

All of these are correct.

17.

The chromosomes (no longer homologous pairs) line up along the equator (middle) of the cell and are attached at their centromeres to spindle fibers.

a)

metaphase II

b)

anaphase I

c)

metaphase I

d)

telophase II

18.

The spindle fibers disassemble & the cell splits, forming 2 haploid cells.

a)

metaphase II

b)

prophase II

c)

metaphase I

d)

telophase I

19.

The cells undergoes cytokinesis after this phase, forming four haploid daughter cells.

a)

anaphase II

b)

telophase II

c)

metaphase I

d)

telophase I

20.

The homologous chromosomes (tetrads) are dragged towards opposite poles of the cell by the spindle fibers.

a)

anaphase I

b)

anaphase II

c)

metaphase I

d)

metaphase II

21.

Homologous chromosomes pair forming tetrads, the nuclear envelope breaks down, & the spindle starts to form. (The stage where crossing-over occurs.)

a)

anaphase II

b)

prophase II

c)

telophase I

d)

prophase I

22.

The pairs of homologous chromosomes (tetrads) are moved by the spindle to the equator of the cell.

a)

metaphase I

b)

metaphase II

c)

telophase I

d)

prophase II

23.

A new spindle forms around the chromosomes, the nuclear envelope breaks down, crossing-over does NOT occur.

a)

telophase II

b)

metaphase II

c)

telophase I

d)

prophase II

24.

The centromeres divide and the sister chromatids (now called chromosomes) move towards opposite poles of the cells.

a)

prophase I

b)

metaphase II

c)

anaphase I

d)

anaphase II

25.

A nuclear envelope forms around each of the four sets of chromosomes.

a)

anaphase I

b)

anaphase II

c)

telophase I

d)

telophase II

26.

This figure is showing the steps in _____.

a)

mitosis

b)

oogenesis

c)

spermatogenesis

d)

sporogenesis

27.

This figure is showing the steps in _____.

a)

mitosis

b)

oogenesis

c)

spermatogenesis

d)

sporogenesis

28.

The diploid number of chromosomes in humans is _____.

a)

n = 23

b)

2n = 23

c)

n = 46

d)

2n = 46

29.

The haploid number of chromosomes in humans is _____.

a)

n = 23

b)

2n = 23

c)

n = 46

d)

2n = 46

30.
Identify the phase:
a)
Metaphase I
b)
Metaphase II
c)
Anaphase I
d)
Anaphase II
31.
Identify the phase.
a)
Metaphase I
b)
Metaphase II
c)
Anaphase I
d)
Anaphase II
32.
Identify the process.
a)
Mitosis
b)
Meiosis I
c)
Meiosis II
d)
Interphase
33.
After meiosis II the daughter cells will contain ____ chromosomes if the original cell contained 78.
a)
78
b)
39
c)
23
d)
46
34.
Which of the following cells is a gamete?
a)
egg
b)
bone
c)
heart
d)
muscle
35.

The fertilized egg is called a/an _____.

a)
gamete
b)
allele
c)
homolog
d)
zygote
36.

In mitosis, the cells created are genetically _____. In meiosis, the cells created are genetically _____.

a)

diverse, identical

b)

identical, diverse

37.
When does replication of chromosomes occur in animal cell meiosis?
a)
Before Meiosis I and Meiosis II
b)
Before Meiosis II Only
c)
Before Meiosis I Only
d)
During Prophase I and Prophase II
38.

In sexual reproduction, chromosome reduction during meiosis is necessary to _____.

a)

ensure that all offspring have the correct diploid number of chromosomes

b)

ensure that all offspring have the correct haploid number of chromosomes

c)

ensure that all daughter cells are identical

d)

ensure that all offspring have the correct triploid number of chromosomes

39.

1n indicates that the cell is _____.

a)

Diploid

b)

Haploid

40.

This type of asexual reproduction has offspring (which are smaller identical versions of the parent) growing off of the parent.

a)

Budding

b)

Regeneration

c)

Runner

d)

Binary Fission

41.

Is this karyotype for a male or female?

a)

MALE

b)

FEMALE

42.

Is this a normal human karyotype?

a)

YES

b)

NO

43.
Which process and type of resulting cells are represented?
a)
mitosis, gametes
b)
mitosis, body cells
c)
meiosis, gametes
d)
meiosis, body cells
44.
Which of the following produces identical nuclei in cells?
a)
pollination
b)
mitosis
c)
osmosis
d)
fertilization
45.
Which of the following cell types is formed by meiosis?
a)
muscle cells
b)
skin cells
c)

sperm or egg cells

d)
blood cells
46.
Which cellular process is shown?
a)
meiosis
b)
endocytosis
c)
mitosis
d)
phagocytosis
47.
Which statement correctly describes meiosis?
a)
cells divide only once
b)
meiosis does not occur in reproductive cells
c)
the cells produced at the end of meiosis are genetically identical to the parent cell
d)
The cells produced at the end of meiosis contain half the number of chromosomes as the parent cell
48.
Which of the following best describes meiosis?
a)
It is carried out in all tissues theat require cell replacement
b)
It occurs only in cells in the reproductive structures of an organism
c)
It happens in all of the tissues except the brain and spinal cord
d)
It is the first stage of mitosis
49.
Which best describes the process shown?
a)
mutation in which the DNA content of the gene is ltered
b)
segregation of sister chromatids
c)
condensation and segregation of the alleles
d)

crossing-over in which alleles are exchanged

50.

Which of the following represents chromosome number during fertilization?

a)

n+n=2n

b)

n=n

c)

4n=2n+2n

d)

2n=2n

51.

Based only on the sex chromosomes in typical human egg and sperm cells at fertilization, the probability of producing a female is _____.

a)

25%

b)

50%

c)

75%

d)

90%

52.
If an intestinal cell in a butterfly contains 24 chromosomes, a butterfly egg would contain
a)
3
b)
6
c)
12
d)
24
53.

Body cells of fruit flies contain 8 chromosomes. Scientists used studies of flies to discover how egg and sperm are formed. What did they observe?

a)

Body cell of offspring flies have 16 chromosomes

b)

Sperm cells have 8 chromosomes

c)

Egg cells have 4 chromosomes

d)

Body cells of offspring have 4 chromosomes

54.

What is one advantage of sexual reproduction?

a)

Offspring are identical to parents.

b)

Offspring are resistant to viruses.

c)

Offspring are born live, rather than from eggs.

d)

Offspring inherit a wider variety of genetic information.

55.

How is the process used to produce sex cells different from the process used to produce body cells?

a)

Only the process used to make sex cells uses spindle fibers.

b)

Only the process used to make sex cells produces haploid cells.

c)

Only the process used to make sex cells can result in mutations.

d)

Only the process used to make sex cells requires DNA replication.

56.
A male shark has 40 chromosomes in each of its sex cells. How many would be present in its body cells?
a)
20
b)
40
c)
80
d)
160
57.

A human body (somatic) cell usually has how many chromosomes?

a)

6

b)

22

c)

4

d)

46

58.

What kind of cells are made in MEIOSIS?

a)

haploid gametes

b)

diploid somatic cells

c)

skin cells

d)

liver cells

59.

When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _____ occurs. (It's one of the ways to introduce genetic variation.)

a)

crossing over

b)

mutagenesis

c)

hybridization

d)

fertilization

60.
The process of crossing over occurs in what phase of meiosis?
a)
anaphase 1
b)
prophase 1
c)
prophase 2
d)
telophase 1
61.
The cells produced via meiosis are called:
a)
sex cells
b)
somatic cells
c)
body cells
d)
skin cells
62.

Why do we need meiosis?

a)

It doubles the number of chromosomes going into the sex cells.

b)

It halves the number of chromosomes going into the sex cells.

c)

It triples the number of chromosomes going into sex cells.

d)

It does not change the number of chromosomes going into sex cells.

63.

The chromosomes that pair up during prophase I of meiosis are called _____.

a)

heterozygous

b)

asexual

c)

homologous pairs

d)

genes

64.
What phase is represented?
a)
metaphase 1
b)
metaphase 2
c)
anaphase 1
d)
anaphase 2
65.
What phase is represented?
a)
metaphase 1
b)
metaphase 2
c)
anaphase 1
d)
anaphase 2
66.

Why is it better to reproduce sexually versus asexually? What is one of the advantages?

a)
survival of the fittest
b)
overproduction
c)
genetic variation
d)
cloning
67.

Homologous chromosomes pair up and form a tetrads.

a)

prophase 1

b)

anaphase 1

c)

telophase 2

d)

metaphase 2

68.

Spindle fibers separate homologous chromosomes to opposite sides of the cell.

a)

prophase 1

b)

anaphase 1

c)

telophase 2

d)

metaphase 2

69.

The nuclear membrane reforms, cytoplasm divides, and 4 daughter cells are formed.

a)

prophase 1 & cytokinesis

b)

anaphase 1 & cytokinesis

c)

telophase 2 & cytokinesis

d)

metaphase 2 & cytokinesis

70.

Chromosomes line up along the equator, not in homologous pairs.

a)

prophase 1

b)

anaphase 1

c)

telophase 2

d)

metaphase 2

71.

Crossing-over occurs during _____.

a)

prophase 1

b)

anaphase 2

c)

metaphase 1

d)

telophase 1

72.

Chromatids separate during _____, forming individul/linear chromosomes.

a)

prophase 1

b)

anaphase 2

c)

metaphase 1

d)

telophase 1

73.

Homologs line up along the equator.

a)

prophase 1

b)

anaphase 2

c)

metaphase 1

d)

telophase 1

74.

Cytoplasm divides, then 2 haploid daughter cells are formed.

a)

prophase 1 & cytokinesis

b)

anaphase 2 & cytokinesis

c)

metaphase 1 & cytokinesis

d)

telophase 1 & cytokinesis

75.

Which step of meiosis is this image showing?

a)

prophase 1

b)

anaphase 1

c)

telophase 2

d)

metaphase 2

76.

Which step of meiosis is this image showing?

a)

prophase 1 & cytokinesis

b)

anaphase 1 & cytokinesis

c)

telophase 2 & cytokinesis

d)

metaphase 2 & cytokinesis

77.

Which step of meiosis is this image showing?

a)

prophase 1

b)

anaphase 1

c)

telophase 2

d)

metaphase 2

78.

Which step of meiosis is this picture showing?

a)

prophase 2

b)

anaphase 2

c)

metaphase 1

d)

prophase 1

79.

Which step of meiosis is this picture showing?

a)

prophase 2

b)

anaphase 2

c)

metaphase 1

d)

telophase 1

80.

Which step of meiosis is this picture showing?

a)

prophase 2

b)

anaphase 2

c)

metaphase 1

d)

telophase 1

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