D2.1 Mitosis

Question 1

Name the phases of mitosis in order

Answer 1

1. prophase
2. metaphase
3. anaphase
4. telophase

Question 2

What is interphase?

Answer 2

it’s a stage before the mitosis (but not mitosis), when there is chromatin present only

Question 3

What happens in prophase? (3 things)

Answer 3

chromatin condensed into chromosomes, membrane if the nucleus breaks down, the spindle forms

Question 4

What are microtubule organising centres (MTOCs)?

Answer 4

those are structures that organize the spindle fibres

Question 5

What MTOCs does animal cells use?

Answer 5

centrosomes, that contain centrioles

Question 6

What happens in metaphase? (2 things)

Answer 6

microtubules attach to centromeres, chromosomes are lined in the middle (centre)

Question 7

What happens in anaphase?

Answer 7

spindle fibres shorten, the centromere splits and pulls sister chromatids apart

Question 8

What happens in telophase? (3 things)

Answer 8

new nucleus membrane is formed, chromosomes decondense to chromatin, cytokinesis