Across
- 4. A trait that enhances survival or reproduction.
- 7. In a given population there are ___________ among organisms. This provides the potential for natural selection to act.
- 8. Earth's most recent, human-influenced geologic time period.
- 10. Evolution is the change in the characteristics of a species over several ____________.
- 11. The independent origin of the same trait in two separate lineages
Down
- 1. A sudden reduction in the number of alleles in a population.
- 2. The change in allelic composition of genotypes.
- 3. For a new trait to evolve, it must first be produced by a ____________.
- 5. Random genetic _______ is the effect of chance on allele frequencies in populations.
- 6. Success of a particular genotype measured by its contribution to the gene pool.
- 9. ____________ traits are observable, morphological traits.
- 12. (Two words, no space) - The movement of alleles from one population to another.