3 Must Knows For MT1

Question 1

Darwin’s 4 postulates of natural selection

Answer 1

1. Variability - in a trait and in a population
2. Inheritance - traits must be able to be passed on
3. Differential Survival (competition) - more individuals produced than can survive
4. Extinction - must change or die out

Question 2

What did Darwin’s model of evolution only describe?

Answer 2

Natural selection

Question 3

What is evolution?

Answer 3

Changes in allele frequencies in a population over time

Question 4

What are the 4 mechanisms of evolution and which are random/nonrandom?

Answer 4

1. Natural selection (not random)
2. Mutation (random)
3. Genetic drift (random)
4. Gene flow (migration) (random)