Evolution

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Across
  1. 6. by which organisms with favorable traits survive and reproduce
  2. 10. that favors one extreme phenotype
  3. 13. the genes in a population
  4. 15. trait controlled by one gene
Down
  1. 1. testable explanation based on observations
  2. 2. in a population over time
  3. 3. that increase an organism’s chance of survival
  4. 4. that favors intermediate traits
  5. 5. remains or traces of ancient organisms
  6. 7. trait that helps an organism survive in its environment
  7. 8. breeding to produce desired traits
  8. 9. that favors both extremes
  9. 11. often an allele occurs in a population
  10. 12. well-supported scientific explanation
  11. 14. trait controlled by multiple genes