unit 6

5. and characteristic that increases the fitness of an individual
8. Rapid, drastic reduction in number of individuals in a population - reduces variation, changes allele frequencies
10. Natural selection when one extreme of a phenotype has the advantage
13. describes the movement of genes/alleles/individuals between 2 neighboring populations
14. A necessary or desired commodity in an ecosystem -individuals in a population will compete for these
15. When organisms impersonate other organisms to increase fitness
17. measurement of the ability of an individual to survive and create successful offspring
18. collection of all the alleles present in a population
19. group of individuals in the same species and area at the same time that can interbreed
21. Refers to differences among individuals in a population
22. Migration of individuals into a population

1. Natural selection when the average phenotype has the advantage
2. percent of individuals in a population that have a particular trait -expressed as a number between 0 and 1
3. Isolation of a population due to differences in communication, mating rituals, other behaviors
4. The idea that individuals best suited to their environment will achieve higher fitness
6. Isolation of a population due to differences in mating times
7. Selection in a population due to human interference
9. Random changes in allele frequencies attributed to luck, not fitness
11. Migration of individuals out of a population
12. Natural selection when both extremes of a phenotype have the advantage
16. Isolation of a population due to physical barriers
20. When a small part of a population separates and colonizes a new area - respond differently to natural selection pressures