Mitosis

Question 1

What are the general features of cell reproduction?

Answer 1

Reproductive signal
Replication of DNA
Segregation of DNA
Cytokinesis

Question 2

What are the phases of the cell cycle?

Answer 2

G1- Growth phase 1
S- Synthesis phase
G2- Growth phase 2
M- Mitotic phase

Question 3

What occurs during G1?

Answer 3

Growth and normal metabolic roles.

Has the G1/S checkpoint

Question 4

What occurs during S phase?

Answer 4

DNA replication

Question 5

What occurs during G2?

Answer 5

Growth and preparation for mitosis.

Has the G2/M checkpoint

Question 6

Functions of mitosis

Answer 6

Asexual reproduction
Growth and development
Tissue renewal and repair

Question 7

How does S phase prepare the cell for mitosis?

Answer 7

Chromosomes are duplicated but remain as chromatin

Question 8

Describe prophase

Answer 8

Chromosomes condense and each duplicated chromosome is made of two sister chromatids.
The mitotic spindle forms.
The centrosomes move away as they are pushed by microtubules.

Question 9

Describe prometaphase

Answer 9

The nuclear envelope fragments
The microtubules stick to chromosomes
The microtubules stick to kinetochores :. the chromosomes move
Other microtubules push each other away

Question 10

Describe metaphase

Answer 10

Chromosomes move to imaginary metaphase plate

Centromeres of sister chromatids straddle the meta phase plate

Question 11

Describe anaphase

Answer 11

Chromatids separate into separate chromosomes
New chromosomes migrate to the poles of the cell
The cell becomes egg shaped

Question 12

Describe telophase

Answer 12

Two identical sets of chromosomes are at the poles
The chromosomes begin to uncoil
Two nuclear envelopes form
Cytokinesis begins where microfilaments act like draw strings on a bag