Chapter 21 Evolution

Question 1

Define species.

Answer 1

A species is a group of individuals that can exchange DNA through interbreeding.

Question 2

Define gene pool.

Answer 2

A gene pool consists of all the alleles present in all individuals in a species.

Question 3

Define population.

Answer 3

A population is an interbreeding group of organisms of the same species living in the same geographical area.

Question 4

Define adaptation.

Answer 4

Inherited traits that were shaped by natural selection and that promote survival and reproduction.

Question 5

Define evolution.

Answer 5

The change in allele or genotype frequency in a population over time.

Question 6

Define monophyletic group.

Answer 6

A group of organisms that are all descended from the same common ancestor.

Question 7

What are the Hardy-Weinberg conditions?

Answer 7

1. NO selection (no differential survival or reproduction).
2. NO mutation.
3. NO gene flow.
4. NO genetic drift.
5. Random Mating.