Across
- 3. Equilibrium If population is not evolving the allele frequencies in the gene pool do not change
- 5. Isolation Interbreeding populations develop different behaviors, such as different mating daces, songs, etc.
- 7. Clock Uses mutation rates in DNA to estimate how long ago two organisms shared a common ancestor
- 8. Selection form of natural selection in which individuals at the upper and lower ends of distribution curve have higher fitness than the middle of the curve
- 9. Effect A change in allele frequency that results from a small group starting a new population
- 10. Trait Trait controlled by two or more genes
- 11. Population whose members can breed and produce fertile offspring
- 12. Selection individuals near the center of a distribution curve have higher fitness than, either end of the curve
- 13. Gene Trait Trait controlled by one gene that has two alleles
- 14. Principle states allele frequencies in a population will stay in genetic equilibrium unless something causes them to change
- 16. Effect Change in allele frequency following a dramatic loss of population
Down
- 1. Pool All genes, that are present in a population at any one time
- 2. Selection individuals pick mates with certain heritable traits
- 3. Isolation When populations separated by a barrier, such as a river, mountain, or ocean
- 4. Isolation Separation of a species or population so that members can no linger interbreed
- 6. Formation of a new species
- 8. Selection Individuals at one end of the curve have higher fitness than the others
- 15. Frequency Number of times allele occurs in a gene pool
- 17. Isolation Populations that live in the same habitat reproduce at different times