Mitosis

Question 1

What are the new cells used for?

G
R
R

Answer 1

Growth- 2 haploid cells fuse together to form a diploid cell, all genetic information is needed for new organisms. Genetically identical

Repair- if cells damage / die it is important that new cells produced have identical structures and function to ones that have been lost

Reproduction - single-celled organisms divide by mitosis to give 2 new organisms, each organisms is genetically identical to parent cell

Question 2

What is the formal for mitotic index

Answer 2

Number of cells undergoing mitosis
______________________________

Total number of cells

Question 3

What are the stages of mitosis

Answer 3

Propose
Metaphase
Anaphase
Telophase

Question 4

What happens during propose

Answer 4

Chromosomes become visible and the nuclear membrane disintegrates and the nucleolus disappears

They become visible as they contract/condense

Question 5

What happened in the metaphase stage

Answer 5

Spindle fibres form, chromosomes line up on the centre of the cell (at the equator) and line up not in pairs

Question 6

What happens in anaphase stage

Answer 6

Spindle fibres attached to the chromatids contract. Chromatids are pulled towards poles and these are attached by centromere

Question 7

What happens in the telophase stage

Answer 7

Chromosomes reach poles and becomes indistinct, nuclear membrane reforms as well as the nucleolus and the spindle fibres disintegrates

Question 8

How many daughter cells does mitosis produce

Answer 8

2 that have the same number of chromosomes as the parent cell