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Meiosis

Total questions: 50

Worksheet time: 32mins

Name
Class
Date
1.
After meiosis II the daughter cells will contain ____ chromosomes if the original cell contained 78.
a)
78
b)
39
c)
23
d)
46
2.
Which of the following cells is a gamete?
a)
egg
b)
bone
c)
heart
d)
muscle
3.
The pair of chromosomes that contain the same genes (but may be coded differently) and are inherited from a male and female parent are termed ___.
a)
gametes
b)
alleles
c)
zygote
d)
homologs
4.

Is the following cell diploid or haploid?

a)

Diploid

b)

Haploid

5.
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
6.
Identify the phase.
a)
Telophase I
b)
Telophase II
c)
Metaphase I
d)
Metaphase II
7.
Meiosis is the _____.
a)
 nuclear division of gametes
b)
nuclear division of body cells
c)
division of body cells
d)
division of sex cells
8.
In sexual reproduction, chromosome reduction 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
9.
Which of the following produces identical nuclei in cells?
a)
pollination
b)
mitosis
c)
osmosis
d)
fertilization
10.
Which process is necessary for the inherited traits of an organism to be passed along by sexual reproduction?
a)
mitosis
b)
meiosis
c)
mutation
d)
fission
11.
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
12.
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 which alleles are exchanged
13.

Which of the following best explains why the chromosome number is an even number in organisms?

a)

It is only by coincidence, many organisms have an odd number

b)

The diploid number is always even so that when mitosis occurs each cell gets the same number of chromosmes

c)

The diploid chromosome number represents pairs of chromosomes, one from each parent, so that it is always an even number

d)

Chromosomes double very time the cell divides, so after the first division, the number is always even

14.
What phase is represented?
a)
metaphase 1
b)
metaphase 2
c)
anaphase 1
d)
anaphase 2
15.
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.
16.
If a somatic cell in a butterfly contains 24 chromosomes, a butterfly egg would contain
a)
3
b)
6
c)
12
d)
24
17.
Chromosomes exchange genetic material during 
a)
crossing over
b)
replication
c)
synthesis
d)
translation
18.
Which of the following is a true statement about gametes?
a)
In humans, there are 22 pair of autosomes in a gamete.
b)
Gametes have a diploid number of chromosomes.
c)
Gametes are body cells
19.
A diploid cell of a normal male human contains 
a)
22 autosomes and two Y-chromosomes.
b)
22 pairs of autosomes and two Y-chromosomes.
c)
22 pairs of autosomes, one X and one Y-chromosome
d)
22 autosomes and two X-chromosomes
20.
The two parts of a double-stranded chromosome are held together by a... 
a)
Nucleolus
b)
spindle fiber
c)
centromere
d)
centriole
21.
What chromosome is affected by Down's Syndrome?
a)
23
b)
18
c)
13
d)
21
22.
 Turner's Syndrome is monosomy of which chromosome?
a)
18
b)
21
c)
sex chromosome
d)
13
23.
What is a picture used to examine chromosomes called?
a)
Sonogram
b)
Electrocardiogram
c)
X-Ray
d)
Karyotype
24.
What type of mutation is this?
a)
Deletion
b)
Inversion
c)
Duplication
d)
Substitution
25.
The likely cause of genetic disorders is...
a)
Nondisjunction
b)
Overfertilization
c)
Uncontrolled Meiosis
d)
Translocation
26.
Which would be considered a somatic cell?
a)
Sperm cell
b)
Egg Cell
c)
Skin Cell
d)
All of these
27.
Independent assortment contributes to genetic diversity. When does independent assortment occur?
a)
Prophase I
b)
Metaphase I
c)
Anaphase I
d)
Prophase II
28.
What type of cells may never undergo mitosis and make new cells?
a)
blood cells
b)
skin cells
c)
nerve cells
d)
stomach cells
29.
What is the name of the process in which DNA (genetic information) is exchanged during meiosis?
a)
crossing under
b)
crossing over
c)
melding
d)
blending
30.
Diploid Cells are represented by
a)
2n
b)
n
c)
4n
d)
1/2 n
31.
If the Diploid number of Carrots is 18, the haploid number is
a)
18
b)
9
c)
27
d)
36
32.
When homologous chromosomes match up, they form a structure call a ___________.
a)
tetrad (pair of chromosomes, one from mom and one from dad)
b)
triad
c)
diploid
d)
quad (group of 4 replicated chromosomes, 2 from mom and 2 from dad)
33.
Which statement is NOT true about Karyotypes
a)
Chromosomes (pairs 1-22) are arranged by size
b)
Sex chromosomes are found at the end
c)
A normal karyotype has 46 chromosomes or 23 pairs
d)
Having missing or extra chromosomes does not indicate a disorder
34.

What would you call the failure of one or more pairs of homologous chromosomes or sister chromatids to separate normally during meiosis?

a)

nondisjunction

b)

anaphase I

c)

nondiploidy

d)

karyotype

35.

The production of egg and sperm cells is necessary for sexual reproduction because —

a)

it increases the number of chromosomes so that the gametes can combine, giving the organism a complete set of chromosomes

b)

it increases the number of developing offspring

c)

it decreases the number of developing offspring

d)

it reduces the number of chromosomes so the gametes can combine, giving the organism a complete set of chromosomes

36.

The steps of crossing over during meiosis are shown in the diagram. What is the significance of crossing over in Meiosis I?

a)

Crossing over ensures that the four daughter cells produced at the end of Meiosis II have the original number of chromosomes in each cell.

b)

Crossing over ensures that the two daughter cells produced at the end of Meiosis I have half the original number of chromosomes in each cell.

c)

Crossing over ensures that the same combination of alleles remains in each of the four daughter cells at the end of Meiosis II.

d)

Crossing over ensures that the chromosomes in the four daughter cells produced at the end of Meiosis II will have a different assortment of genes than the corresponding chromosomes in the original cell.

37.

Which of the following could result if meiosis did not occur in the process of sexual reproduction?

a)

Chromosomes would no longer contain genetic information.

b)

Chromosome number would increase with each generation.

c)

Chromosomes would not be copied exactly.

d)

Chromosome number would decrease with each generation.

38.

A tree has 44 chromosomes in its gametes. How many chromosomes would the leaf/somatic cells have?

a)

22

b)

44

c)

88

39.
What is this?
a)
Trisomy 13
b)
Monosomy 21
c)
47, XXY
d)
Trisomy 21
40.

In anaphase 1, two _______________ of each chromosome pairs separate and are pulled by spindle fibers toward opposite poles.

a)

chromatids

b)

sister chromatids

c)

homologous pairs

41.

Which of the following statements is true about how the number of chromosomes is reduced between meiosis I and meiosis II?

a)

Crossing-over occurs

b)

Metaphase occurs

c)

DNA replication occurs twice

d)

DNA replication does not occur again

42.

Humans possess two alleles, or variations, for each gene. The alleles may be the same, or they may be different.When humans reproduce, their alleles are separated and independently sorted into different gametes, or sex cells. So, when sex cells randomly combine during fertilization to produce offspring, there is

a)

a high probability of producing a clone.

b)

a low probability of survival.

c)

an increase in genetic variation.

d)

a decreased risk of mutation.

43.
Compared to other cells, how much of the genetic material (DNA) does a sex cell have?
a)
the same amount
b)
twice as much
c)
half as much
d)
none
44.
What is a polar body?
a)
a male sex cell that has a mutation
b)
a female sex cell that has a mutation
c)
a chromosome that has crossed over
d)
a female sex cell that dies and does not develop into an egg
45.

Corn (Zea mays) has 20 chromosomes. How many chromosomes will the daughter cells have after meiosis and cytokinesis?

a)

10 chromosomes

b)

20 chromosomes

c)

30 chromosomes

d)

5 chromosomes

46.

In the figure above, the image is best described as:

a)

independent assortment during metaphase I

b)

independent assortment during metaphase II

c)

crossing over during prophase I

d)

crossing over during prophase II

47.
Compared to the number of chromosomes contained in a body cell, how many chromosomes would normally be contained in a gamete?
a)
The same number
b)
One-fourth as many
c)
Twice as many
d)
Half as many
48.

If the amount of DNA just before prophase I is 4x, how much DNA is present in one nucleus in prophase I

a)

x

b)

4x

c)

2x

49.

The role of meiosis in life cycles is to:

a)

restore the diploid chromosome number in the zygote

b)

produce the haploid chromosome number in the zygote

c)

produce the haploid chromosome number in the sex cells

d)

produce the diploid chromosome number in the sex cells

50.

How is cancer related to cell division?

a)

Mutations can cause uncontrolled cell division which causes cancerous cells to spread rapidly and take nutrients from healthy cells.

b)

Cancer stops cell division from happening.

c)

Cell division causes viruses that spread around the body and cause cancer.

d)

Cancer is not related to cell division.

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