Evolution Lesson 3

Evolution of new species; occurs when members of similar populations no longer interbreed to produce fertile offspring

Organisms that look alike; can interbreed to produce fertile offspring.

Movement of individuals in and out of a population.

Alterations of alleles by chance events; usually in small isolated populations.

A population's genes remains the same (not evolving).

All the genes in a population.

What does the Hardy-Weinberg equilibrium measure?

What do you call all of the genes in a population?

Which of the following would disrupt Hardy-Weinburg equilibrium? (select all that apply)

The American toad (Anaxyrus americanus) and Fowler's toad (Bufo fowleri) live in the same area. However, The American toad mates in early summer while Fowler’s mates in late summer.

Some female peacocks prefer males with large, colorful tales while other female peacocks prefer males with no tail at all. Females are now mating only with the tail they prefer. What type of reproductive barrier is this?

A flash flood carried a raft of Amazon ants away from their original population. There is enough distance between the two groups, that they will never meet in nature again. What type of reproductive barrier is this?

Populations of organisms change rapidly interrupting long, stable periods without change.

When species reproduce at different times.

Populations of organisms change gradually over time…slow, steady change.

Where species that were once similar become different.

Rapid, divergent evolution that occurs when a species evolves into an array of species to fit diverse habitats.

When distantly related or unrelated organisms evolve similar traits due to similar habitats, causing them to resemble each other.

The process by which two species evolve in response to changes in each other over time.