Meiosis and Mitosis

Question 1

Associate the process to its function

1) Mitosis
2) Meiosis
a) Produce somatic cells
b) create genetic variation

Answer 1

1-a 2-b

Question 2

Does crossover occur in mitosis, meiosis I, or meiosis II?

Answer 2

Meiosis I

Question 3

What is crossover?

Answer 3

Exchange of DNA between homologous chromosomes

Question 4

A diploid cell undergoes mitosis, what is its ploidy level in late metaphase?

Answer 4

2n

Question 5

A diploid cell with n=7 undergoes meiosis, how many single-stranded chromosomes are there in prophase I?

Answer 5

0, all chromosomes are double-stranded in prophase I

Question 6

A diploid cell with n=5 undergoes meiosis II, what is its ploidy level in anaphase II?

Answer 6

2n (only phase of meiosis II which is not 1n)

Question 7

A diploid cell with n=4 undergoes mitosis, how many chromatids are there in the cell after prometaphase?

Answer 7

16 chromatids (8 chromosomes)

Question 8

A triploid cell has n=5, how many double-stranded chromosomes are there in G1?

Answer 8

0, all are single-stranded in G1

Question 9

Which checkpoint (G1/S, G2/M, or M) blocks access to the start of mitosis and meiosis?

Answer 9

G2/M

Question 10

Can mitosis produce new organisms?

Answer 10

Yes, in asexual reproduction

Question 11

In which stage of meiosis do tetrads form?

Answer 11

Prophase I

Question 12

A triploid cell with n=10 undergoes mitosis. How many chromosomes are there in the cell at the end of anaphase?

Answer 12

60 (2x3n=6n in anaphase)

Question 13

Do gametes undergo mitosis or meiosis?

Answer 13

Meiosis

Question 14

What are three requirements (cell components) for cells to divide in all types of anaphase?

Answer 14

Spindle fibers, centrosomes, and kinetochores

Question 15

When do chromosomes become double-stranded in interphase?

Answer 15

During the S-Phase

Question 16

A 4n=32 cell undergoes mitosis, how many sets of chromosomes are there at the end of prometaphase?

Answer 16

4

Question 17

What is chiasma? Is it present in mitosis, meiosis I, or meiosis II?

Answer 17

It is the point of contact between two chromatids of homologous chromosomes during (or after) crossover. It is present in meiosis I

Question 18

True or false? Meiosis produces 4 identical daughter cells.

Answer 18

False, it produces unique cells

Question 19

True or False? Mitosis produces two identical haploid cells

Answer 19

False, it produces diploid cells

Question 20

How is genetic variation created in meiosis? Give 2 ways.

Answer 20

Possible answers: Crossing over, independant assortment, and random fertilization

Question 21

True or false? Chromosomes align at the cell equator during metaphase I

Answer 21

False, tetrads align, not chromosomes.

Question 22

What is the equivalent of tetrads, but for plants?

Answer 22

Bivalents

Question 23

How are gametes undergoing meiosis called in plants?

Answer 23

Spores

Question 24

True or false? Interkinesis occurs directly after telophase I

Answer 24

True

Question 25

What is the last set of genes to be turned off before mitosis?

Answer 25

The Nucleoli