BIO120 #2 (7-12)

Question 1

Population

Answer 1

• Group of individuals of the same species and live in the same area at the same time.

Question 2

Migration

Answer 2

• The movement of individuals between pop’ns.

Question 3

Gene flow

Answer 3

• The movement of genes between pop’ns

- Most gene flow is local (short distances).

Question 4

Effects of natural selection on population divergence

Answer 4

• Selection increases population divergence (between pop’ns) as different pop’ns acquire unique mutations and experience different environmental pressures.
• Evolve separately

Question 5

Effect of genetic drift on population divergence

Answer 5

• Genetic drift increases population divergence as there are different random events that affect the two populations.

Question 6

Effects of gene flow on population divergence

Answer 6

• Gene flow decreases population divergence as advantageous traits between pop’ns are shared  making the populations more similar.
• Low gene flow can still maintain differences (unique mutations).
• High gene flow: more similar and less diversity.