Sources of variation Flashcards
(6 cards)
1
Q
Mutation
A
A permanent change in the DNA base sequence that results in a new allele being formed.
2
Q
Meiosis
A
a type of cell division which produces egg and sperm cells(gametes) with half the number of chromosomes as the parent cell.
3
Q
Migration
A
The movement of individuals between different populations.
4
Q
Small Population Size
A
The smaller the population size the greater impact of other changes, e.g environment, climate, humans
5
Q
Different survival rates/natural selection
A
Some phenotypes will be more favoured by the environment/humans therefore have better chances of survival.
6
Q
Non-random mating
A
The selection of mates in a way that limits breeding partners.
