Ch 10

Question 0

Population Genetics

Answer 0

Study of evolution form a molecular (genetic) viewpoint.

Question 1

What is the law superposition?

Answer 1

If the rock strata (layer) has not been disturbed then the lowest layer is the oldest

Question 2

Population

Answer 2

Unit of evolution (populations evolve, individuals do not).

Question 3

Biogeography

Answer 3

The study of locations of where organisms live now and where their ancestors loved.
How and why they live where they live.

Question 4

Fitness

Answer 4

How well the Organism survives and produces

Question 5

Vestigial structures

Answer 5

Structures that have no use but might have in a last ancestor.

Question 6

Speciation

Answer 6

Process of a new species being formed

Question 7

What causes variation in traits?

Answer 7

1. Food variability / den location
2. Predators
3. Mutation
4. Catastrophic events
5. Genetics
6. Recombination (when genes get mixed in meiosis)
7. Random pairing of sperm and eggs

Question 8

Hardy-Weinberg Equilibrium

Answer 8

A population doesn’t change its allele frequency if..

1. No new mutations
2. No immigration and emigration
3. Very large population
4. Mating is at random
5. No natural selection

Question 9

Relative vs absolute dating

Answer 9

Absolute - age of existence

Relative - age and order of sequence events

Question 10

Homologous structures

Answer 10

Structures that are similar in related organisms because they were inherited by a common ancestor. (May or May not have same function)

Question 11

Analogous structures

Answer 11

Similar structures in unrelated organisms (ex wings of birds and bats)

Question 12

Gene pool

Answer 12

Consists of all genes of all members of the population.
Each pool = different alleles
Population characterized by frequency

Question 13

Allele frequency

Answer 13

How often an allele occurs in a gene pool relative to other to other allele genes