Cell Division - Mitosis

Question 1

Body cells normally have [ ] of each chromosome

Answer 1

2 copies

Question 2

What is mitosis used for?

Answer 2

When plants and animals want to grow or replace cells that have been damaged

Question 3

Define mitosis

Answer 3

Mitosis is when a ell reproduces itself by splitting to form 2 identical offspring

Question 4

Describe the DNA in a cell that ISN’T dividing

Answer 4

All spread out in long strings

Question 5

Describe the process of mitosis (4)

Answer 5

1) The DNA is copied and forms X-shaped chromosomes.
2) The chromosomes then line up at the centre of the cell and cell fibres pull them apart. The 2 arms of each chromosome go to opposite ends of the cell
3) Membranes form around each set of chromosomes, these become the nuclei of the 2 new cells
4) The cytoplasm divides

Question 6

X-shaped chromosomes: Each arm of the chromosome is an [ ] of the other

Answer 6

exact duplicate

Question 7

What happens when a cells gets a signal to divide?

Answer 7

It needs to replicate its DNA - so there’s one copy for each new cell

Question 8

What is the end result of mitosis?

Answer 8

You get 2 new cells contain exactly the same DNA - they’re identical

Question 9

Some organisms [ ] by mitosis. This is an example of [ ] reproduction. The offspring have exactly the same genes as the parent - there’s no [ ]

Answer 9

reproduce
asexual
variation