1.4 Speciation

Question 1

Gene Pool

Answer 1

All the alleles present in a reproducing population

Question 2

Species

Answer 2

Members of a population that can interbreed in nature to produce fertile offspring

Question 3

Speciation

Answer 3

1. Refers to an event that produces two species
2. Members of the population must become isolated from each other
3. Isolation can be either geographical, behavioral or temporal

Question 4

Geographical Isolation

Answer 4

• separated by geographical barrier
• could be result of earthquake, volcano, flood, river changing course

Question 5

Behavioral Isoaltion

Answer 5

• change in mating behavior
• might involve song or call, dance, courtship behavior, coloration

Question 6

Temporal Isolation

Answer 6

Changes in the timing of Reproduction
- different times (day vs. night)
- different seasons

Question 7

Phyletic Gradualism

Answer 7

• gradual speciation
• evolution change is slow and steady with accumulated changes over time, leading to speciation

Question 8

Punctual Equilibrium

Answer 8

• abrupt speciation
• periods of stasis are interrupted by rapid change, leading to speciation