Speciation

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Across
  1. 5. measures how frequent an allele of a gene is expressed in a population
  2. 7. courtship and mating behavior causing isolation in species
  3. 10. characteristics that increase an organism's chances of survival
  4. 11. members of separate populations cannot make successfully
  5. 12. total number of genes of all organisms in a population
  6. 14. organisms of the same species living together
  7. 15. a group of similar organisms capable of reproducing fertile offspring
Down
  1. 1. change in genetic composition of a population over many generations
  2. 2. new species forming as a result of evolution
  3. 3. organisms well adapted to their environment survive and reproduce more offsping
  4. 4. physial barrirers dividing a population
  5. 6. study of geographical distribution of plant and animals
  6. 8. timing of reproductive periods can prevent mating
  7. 9. differences in organisms
  8. 13. implies reproductive success