5.1 Cell Division and Growth Flashcards
1
Q
What are the two reasons cells divide by mitosis?
A
For growth and to repair damaged cells
2
Q
What does mitosis result in?
A
Two identical cells being produced from the original cell
3
Q
What do chromosomes contain?
A
Genes (alleles)
4
Q
What are genes?
A
Sections of DNA that determine the characteristics of an individual
5
Q
What happens before a cell divides by mitosis?
A
The genetic information duplicates
6
Q
How many pairs of chromosomes are there in the nucleus of a normal body cell?
A
23
7
Q
What are stem cells?
A
Unspecialised cells in the embryo of animals and plant cells at an early stage in their development
8
Q
When do most animal cells differentiate?
A
At an early stage in their development
9
Q
When can plant cells differentiate?
A
Throughout their lives
