Genetic Diversity And Adaptation Flashcards
(7 cards)
1
Q
What is genetic diversity
A
The number of different alleles in a population
2
Q
2 sources of genetic diversity
A
Mutation
Gene flow
3
Q
What is natural selection
A
Acts on genetic variation
Indiviuals with advantageous alleles are more likely to survive and reproduce, passing on these alleles
Overtime frequency of advantageous alleles increases in the population
4
Q
What are the 2 types of selection
A
Directions
Stabilising
5
Q
What is directional selection
A
Favours one extreme phenotype and shifts mean phenotype
6
Q
What is stabilising selection
A
Favours the mean phenotype which reduces variation
7
Q
What are the 3 adaptations that develop via natural selection
A
- anatomical ( structural e.g thick fur)
- physiological (internal processes e.g hibernation metabolism
- behavioural (ways they act e.g migration)
