chapter 17 vocab

3. a trait controlled by only one trait
4. controlled by two or more genes
6. allele frequencies change as a result of the migration of a small subgroup of population
7. random change in allele frequency
8. when individuals at one end of the curve have higher fitness than individuals at the middle or other end
9. when a population gets split by a geographic barrier
10. estimate the time that two species have been evolving independently
11. once a population has split, changes in one group will not effect the other
12. same species, but different behaviors like in courtship rituals
13. allele frequencies in its gene pool do not change
14. when two or more species reproduce at different times
15. individuals at the two ends are higher than the middle
18. number of times an allele occurs in a gene pool
19. consists of all genes

1. change in allele frequency following a dramatic reduction in the size of the population
2. population whose members can interbreed to produce fertile offspring
3. individuals at the middle of the curve have higher fitness than ones at the ends
5. allele frequencies should remain constant unless factors cause it to change
16. individuals in a species select mates based on heritable traits
17. formation of a new species