Meiosis

Question 1

How many daughter cells are produced in meiosis?

Answer 1

4

Question 2

What are the stages of Meiosis 1

Answer 2

S phase (interphase) 
Prophase 1
Metaphase 1 
Anaphase 1 
Telophase 1
Cytokinesis

Question 3

What are the stages of meiosis 2

Answer 3

Prophase 2 
Metaphase 2 
Anaphase 2
Telophase 2 
Cytokinesis

Question 4

What occurs in the S phase (interphase) in meiosis 1?

Answer 4

Interphase- cell prepares for division

G1- cell grows and makes necessary proteins.

S-phase- replication of DNA

G2- further growth

Question 5

Prophase 1

Answer 5

• DNA condenses and becomes visible

- Nuclear envelope breaks down

Question 6

Metaphase 1

Answer 6

Homologous pairs line up along the equator of the spindle.

Question 7

Anaphase 1

Answer 7

• Homologous pairs of chromosomes are separated.

- chromosomes are pulled to the poles of the spindle.

Question 8

Telophase 1

Answer 8

• spindle fibres break down

- nuclear envelope forms around groups of chromosomes

Question 9

Cytokinesis 1

Answer 9

Division of the cytoplasm.

Question 10

Prophase 2

Answer 10

• Chromosomes condense

- nuclear envelope breaks down

Question 11

Metaphase 2

Answer 11

Chromosomes line up along the equator of the spindle.

Question 12

Anaphase 2

Answer 12

• chromatids pulled to opposite poles.

- this creates four groups of chromosomes

Question 13

Telophase 2

Answer 13

Nuclear envelope forms around each group of chromosome.

Question 14

Cytokinesis 2

Answer 14

Cytoplasm divides forming four haploid cells.

Question 15

At what stage does crossing over occur in meiosis?

Answer 15

Prophase 1

Question 16

What is crossing over?

Answer 16

Homologous chromosomes exchange genetic material.

A chromatid from the maternal chromosome twists around the paternal chromosome and they connect forming a chiasmata.

This forms different combinations of alleles.

Question 17

At what stage does independent assortment occur in meiosis?

Answer 17

Metaphase

Question 18

What is independent assortment?

Answer 18

When during the metaphase the chromosomes will line up along the equator of the cell in a random order.

This will cause different combinations of chromosomes to end up with each gamete.