Evolution Flashcards
1
Q
What are the five factors which affect the frequency of alleles in a population and thus evolution?
A
1) Mutation
2) Sexual selection
3) Gene flow
4) Genetic drift
5) Natural selection
2
Q
List four density dependent factors
A
Competition, predation, parasitism, communicable disease
3
Q
List four density independent factors
A
Climate change, natural disasters, seasonal change and human activities
4
Q
List two examples of bottlenecks
A
Cheetahs
Northern elephant seals - hunted near to extinction
5
Q
Name an extreme example of genetic drift
A
Founder effect
6
Q
Give an example of genetic drift
A
Amish people
7
Q
Name the three types of selection
A
1) Stabilising selection
2) Directional selection
3) Disruptive selection
