Chromosomes and mitosis Flashcards
1
Q
Describe the first stage of the cell cycle
A
The DNA replicates to form two copies of each chromosome, the cell grows bigger and sub-cellar structures e.g. mitochondria and ribosomes replicat aswell
2
Q
Describe the second stage of the cell cycle
A
One set from each chromosome is pulled to each side of the cell, and the nucleus divides
3
Q
Describe the third stage of the cell cycle
A
The cytoplasm and cell membrane divide to form two identical daughter cells
4
Q
Name some functions of mitosis
A
- Asexual reproduction
- Growth and development in multi-cellular orgnisms e.g. animals
- Repairing damaged tissues
- Replacing cells
5
Q
How many chromosomes are their in a cell?
A
23 pairs
6
Q
Which cells do not have 23 pairs of chromosomes?
A
The gametes
