Unit 7

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Across
  1. 3. A process in which individuals that have certain inherited traits tend to survive and reproduce at higher rates than other individuals because of those traits.
  2. 4. A change in the allele frequency of a population as a result of chance events rather than natural selection.
  3. 8. movement of alleles from one population to another
  4. 9. Any difference between individuals of the same species.
  5. 11. A trait that helps an organism survive and reproduce
  6. 13. Number of times that an allele occurs in a gene pool compared with the number of alleles in that pool for the same gene
  7. 15. Natural selection that favors intermediate variants by acting against extreme phenotypes
  8. 17. A group of individuals that belong to the same species and live in the same area
  9. 18. Form of reproductive isolation in which two populations have differences in courtship rituals or other types of behavior that prevent them from interbreeding
  10. 19. the act of concealing the identity of something by modifying its appearance
Down
  1. 1. change in allele frequencies as a result of the migration of a small subgroup of a population
  2. 2. form of natural selection in which a single curve splits into two; occurs when individuals at the upper and lower ends of a distribution curve have higher fitness than individuals near the middle
  3. 5. form of reproductive isolation in which two populations reproduce at different times
  4. 6. form of reproductive isolation in which two populations are separated physically by geographic barriers such as rivers, mountains, or stretches of water
  5. 7. Form of natural selection in which the entire curve moves; occurs when individuals at one end of a distribution curve have higher fitness than individuals in the middle or at the other end of the curve
  6. 10. Ability of an animal to look like another more harmful animal
  7. 12. Combined genetic information of all the members of a particular population
  8. 14. Ability of an organism to survive and reproduce in its environment
  9. 16. A change in allele frequency following a dramatic reduction in the size of a population