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Meiosis

Total questions: 38

Worksheet time: 26mins

Name
Class
Date
1.

What causes genetic variation during meiosis?

a)

Chromatids cross over

b)

Chromosomes separate

c)

Chromatids separate

d)

Chromosomes cross over

2.

Meiosis produces ____________.

a)

diploid sex cells

b)

diploid body cells

c)

haploid sex cells

d)

haploid body cells

3.

Diploid cells are represented by _______.

a)

n

b)

2n

c)

4n

d)

1/2 n

4.

If carrots have a diploid number of 18, then the haploid number is ______.

a)

3

b)

9

c)

24

d)

36

5.

During which phase of meiosis does crossing over occur?

a)

Prophase 1

b)

Metaphase 1

c)

Prophase 2

d)

Anaphase 2

6.

Chromosomes that pair up during meiosis are called __________ chromosomes.

a)

homozygous

b)

chromatids

c)

homologous

d)

genes

7.

When homologous chromosomes pair up during meiosis, they form a structure call a ___________.

a)

triad

b)

diploid

c)

tetrad

d)

quadrad

8.

What happens when crossing over occurs during meiosis?

a)

Sisters chomatids separate

b)

Homologous chromosomes separate

c)

Gamete cells are formed

d)

Chromosomes exchange genetic information

9.

Which of the following best describes meiosis?

a)

All cells go through meiosis

b)

Only reproductive (sex) cells go through meiosis

c)

Only somatic (body cell) go through meiosis

d)

Meiosis creates diploid cells.

10.

What meiotic phase does the image represent?

a)

Metaphase 1

b)

Anaphase 1

c)

Prophase 2

d)

Metaphase 2

11.

What meiotic phase does the image represent?

a)

Prophase 1

b)

Metaphase 1

c)

Anaphase 2

d)

Metaphase 2

12.

Daughter cells of mitosis are genetically ____________, while daughter cells of meiosis genetically ____________.

a)

identical, identical

b)

different, different

c)

different, identical

d)

identical, different

13.

A human zygote should have _____ chromosomes.

a)

12

b)

23

c)

46

d)

92

14.

What equation represents what happens to the chromosome number during fertilization?

a)

n+n=2n

b)

n=n

c)

2n=n+n

d)

2n=2n

15.

In humans, gametes each have _____ chromosomes. Therefore, a fertilized human egg cell would have _____ chromosomes.

a)

46, 23

b)

23, 46

c)

92,46

d)

11,12

16.

After meiosis, there are _______ daughter cells that are genetically ____________.

a)

2, identical

b)

2, different

c)

4, identical

d)

4, different

17.

A human usually has ______ chromosomes in their somatic (body) cells.

a)

6

b)

22

c)

4

d)

46

18.

Gamete (sex) cells undergo meiosis to _____________________.

a)

double the number of chromosomes

b)

halve the number of chromosomes

c)

triple the number of chromosomes

d)

replicate chromosomes

19.

When does the cellular process in the image occur?

a)

Mitosis 1

b)

Meiosis 1

c)

Mitosis 2

d)

Meiosis 2

20.

Which of the following cells are gametes (sex cells)?

a)

Heart, Liver

b)

Nerve, Sperm

c)

Ovum (egg), sperm

d)

Muscle, skin

21.

Two chromosomes that have the same structure and genes, but may contain different alleles are called ________.

a)

gametes

b)

alleles

c)

chromatids

d)

homologs

22.
The fertilized egg is termed a/an _____.
a)
gamete
b)
allele
c)
homolog
d)
zygote
23.

Is the following cell diploid or haploid?

a)

Diploid

b)

Haploid

24.

When do chromosomes replicate in sex cells?

a)

Before Meiosis I and Meiosis II

b)

Only before Meiosis I

c)

Only before Meiosis II

d)

During Mitosis

25.

Which statement correctly describes meiosis?

a)

Cells divide only once.

b)

Meiosis does not occur in reproductive cells.

c)

Cells produced during meiosis are genetically identical.

d)

Cells produced during meiosis have half the number of chromosomes as the parent cell.

26.
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
27.
The haploid number of chromosomes for humans is ____.
a)
46
b)
43
c)
23
d)
26
28.

During meiosis, how many times does a cell divide?

a)

1

b)

2

c)

4

d)

6

29.
The result of meiosis is ______.
a)
two diploid cells
b)
two haploid cells
c)
four diploid cells
d)
four haploid cells
30.

Which process produces the most variation within a species?

a)

Mitosis

b)

Cloning

c)

Meiosis

d)

All of the above

31.

What cellular process does the image represent?

a)

Mitosis

b)

DNA replication

c)

Meiosis

d)

Protein synthesis

32.

What best describes the process represented by the image?

a)

Chromosomal mutations

b)

Replication of DNA

c)

Joining of sister chromatids

d)

Crossing-over and exchange of alleles

33.

Which of the following represents chromosome number during fertilization?

a)

n = n

b)

n+n = 2n

c)

2n+2n = 4n

d)

2n - n = n

34.

Haploid cells are represented by _______.

a)

n

b)

2n

c)

4n

d)

1/2 n

35.

A human usually has ______ chromosomes in their sex cells.

a)

11

b)

23

c)

46

d)

92

36.

After mitosis, there are _______ daughter cells that are genetically ____________.

a)

2, identical

b)

2, different

c)

4, identical

d)

4, different

37.

When does the cellular process shown in the image occur?

a)

DNA Replication

b)

Mitosis, Prophase

c)

Meiosis, Prophase 1

d)

Meiosis, Prophase 2

38.

During meiosis, homologous chromosomes separate during ______, and sister chromatids separate during ______.

a)

Both during Meiosis 1

b)

Both during Meiosis 2

c)

Meiosis 1, Meiosis 2

d)

Meiosis 2, Meiosis 1

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