Unit 6 biology

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Across
  1. 5. change in allele frequencies as a result of the migration of a small subgroup of a population
  2. 7. Ability of an animal to look like another more harmful animal
  3. 9. A change in the allele frequency of a population as a result of chance events rather than natural selection
  4. 12. favors individuals at both extremes of the phenotypic range
  5. 14. how often a form of a gene appears in a gene pool
  6. 16. Natural selection that favors intermediate variants by acting against extreme phenotypes
  7. 18. Form of reproductive isolation in which two populations have differences in courtship rituals
  8. 19. A trait that helps an organism survive and reproduce
  9. 20. Migration to a new location
Down
  1. 1. movement of individuals out of an area
  2. 2. All the genes
  3. 3. form of reproductive isolation in which two populations reproduce at different times
  4. 4. form of reproductive isolation in which two populations are separated physically by geographic barriers such as rivers, mountains, or stretches of water
  5. 6. A process in which individuals that have certain inherited traits tend to survive and reproduce
  6. 8. occurs when natural selection favors one of the extreme variations of a trait
  7. 10. A change in allele frequency following a dramatic reduction in the size of a population
  8. 11. movement of alleles from one population to another
  9. 13. Differences among individuals in the composition of their genes or other DNA segments
  10. 15. Ability of an organism to survive and reproduce in its environment
  11. 17. A group of individuals that belong to the same species and live in the same area