Biology- Chromosomes and mitosis (year 9) Flashcards
1
Q
What do chromosomes contain
A
Genetic information
2
Q
What are chromosomes
A
Coiled up lengths of DNA molecules
3
Q
What do each chromosome carry
A
A large number of genes
4
Q
What do genes control
A
The development of each characteristic e.g hair colour or eye colour
5
Q
How many chromosomes are their in a human cell
A
23 pairs
6
Q
The cell cycle makes new cells for what
A
Growth, development and repair
7
Q
What happens in the cell cycle
A
Body cells in multicellular organisms divide to produce new cells
8
Q
What is it called when the cell divides
A
Mitosis
9
Q
What do organisms use mitosis for
A
to grow or replace cells that have been damaged
