Evolution A2 (mod 6)

Question 1

Whats the difference between evolution via natural selection and via genetic drift?

Answer 1

Genetic drift is due to chance

Natural selection due to environmental factors

Question 2

What is a genetic bottleneck

Answer 2

When an event eg natural disaster causes a reduction in a population size so reduced gene pool

Question 3

Whats the founder effect

Answer 3

When a few organisms from a population start a new population so the gene pool is small