Evolution

2. Selection that favors both extremes
7. Populations are separated by barriers like rivers or mountains, preventing interbreeding.
10. explained evolution by natural selection
12. Populations develop different behaviors, such as mating rituals or songs, preventing interbreeding.
13. Populations reproduce at different times, even if they share the same habitat.
16. Number of times an allele occurs in a gene pool
17. Trait that is controlled by one gene
19. set of alleles an organism carries.

1. Selection that favors one extreme.
3. Trait controlled by two or more genes.
4. Happens when populations can no longer mate.
5. Effect that happens when disaster reduces population size; survivors have different alleles
6. describes individuals that have traits that help them survive and reproduce.
8. Selection that favors average individuals.
9. Physical traits determined by genotype and environment.
11. Group of interbreeding organisms.
14. Is a population that can breed and produce fertile offspring.
15. Effect that happens when a small group colonizes a new habitat with different alleles.
18. pool Contains all alleles in a population.