Evolution Vocabulary

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Across
  1. 4. Number of times that an allele occurs in a gene pool compared with the number of alleles in that pool for the same gene
  2. 5. All the genes, including all the different alleles for each gene, that are present in a population at any one time
  3. 6. Form of reproductive isolation in which two or more species reproduce at different times
  4. 8. Structure that is inherited from ancestors but which has lost most of all of its original functions
  5. 10. Trait controlled by one gene that has two alleles
  6. 12. A group of homeotic genes clustered together that determine the head to tail identity of body parts in animals. All hox genes contain the homeobox DNA sequence.
  7. 14. Body parts that share a common function, but not an evolutionary history
  8. 15. The selection of mates based on heritable traits
  9. 17. Separation of a species or population that they no longer interbreed and evolve into separate species.
  10. 21. Trait controlled by two or more genes
  11. 24. Formation of new species
  12. 25. Process by which organisms that are most suited to their environment survive and reproduce most successfully; also called survival of the fittest
  13. 27. Heritable characteristic that increases an organism's ability to survive and reproduce in an environment
  14. 28. Form of natural selection in which individuals at one end of a distribution curve have higher fitness than individuals in the middle or at the other end of the curve
  15. 29. Preserved remains, or traces of, ancient organisms
  16. 30. change in allele frequencies as a result of the migration of a small subgroup of a population
Down
  1. 1. Structures that are similar in different species of common ancestry
  2. 2. Principle that states the allele frequencies in a population remain constant unless one or more factors cause those frequencies to change
  3. 3. Form of reproductive isolation in which two populations are separated physically by geographic barriers such as rivers, mountains, or stretches of water, leading to the formation of two separate subspecies
  4. 7. Form of natural selection in which individuals near the center of the distribution curve have higher fitness than individuals at either end of the curve
  5. 9. Form of reproductive isolation in which two populations have differences in courtship rituals or other types of behavior that prevent them from interbreeding
  6. 11. Change over time; the process by which modern organisms have descended from ancient organisms
  7. 13. Sum total of all the different forms of genetic information carried by a particular species, or by all organisms on Earth
  8. 16. Selective breeding of plants and animals to promote the occurrence of desirable traits in offspring
  9. 18. A change in allele frequency following a dramatic reduction in the size of a population
  10. 19. Study of past and present distribution of organisms
  11. 20. Natural selection in which individuals at the upper and lower ends of the curve have higher fitness than individuals near the middle of the curve
  12. 22. The movement of genes into or out of a population
  13. 23. Situation in which allele frequencies in a population remain the same
  14. 26. How well an organism can survive and reproduce in its environment