Across
- 2. selection Natural selection in which individuals at one end of the phenotypic range survive or reproduce more successfully than do other individuals.
- 7. pressure the environmental factors that favour certain phenotypes
- 8. selection natural selection in which individuals at the upper and lower ends of the curve have higher fitness than individuals near the middle of the curve
- 9. drift random change in allele frequencies that occurs in small populations
Down
- 1. selection form of natural selection in which individuals near the center of a distribution curve have higher fitness than individuals at either end of the curve
- 3. frequency Proportion of a specific allele in a population.
- 4. effect A change in allele frequency following a dramatic reduction in the size of a population
- 5. effect genetic drift that occurs after a small number of individuals colonize a new area
- 6. pool Combined genetic information of all the members of a particular population