Evolution/Natural Selection

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Across
  1. 2. A variant form of a gene
  2. 3. The genetic makeup of an organism
  3. 6. The physical expression of a genotype
  4. 7. Evolution occurs in response to _____ environmental conditions, not future ones
  5. 10. Differences between two species indicate that heritable changes occurred after divergence from a common ____
  6. 14. Interaction of genes where one affects the expression of another
  7. 15. More offspring are born than can be supported by limited resources
  8. 16. Random change in DNA contributing to evolution
  9. 17. No two individuals are alike
Down
  1. 1. Developed the theory of evolution by natural selection
  2. 4. When more individuals are born than can be supported by the environment
  3. 5. Biological change in which organisms gradually accumulate differencesCompetition Struggle among organisms for limited resources
  4. 8. Heritable trait that increases an organism’s fitness in a specific environment
  5. 9. The disappearance of a species due to inability to adapt
  6. 11. The reproductive success of an organism
  7. 12. Survival and reproduction are not _____
  8. 13. The traits of an organism are likely to be passed to the next generation