chapter 4 review

123456789101112131415
Across
  1. 2. number of species given in an area
  2. 4. Evolution below the species level
  3. 8. A drastic reduction in the size of a population that reduces genetic variation
  4. 9. The complete set of genes in an individual is called
  5. 11. actual set of traits expressed in that individual
  6. 14. Evolution that gives rise to new species, genera, families, classes, or phyla.
  7. 15. are physical locations on chromosomes within each cell of an organism
Down
  1. 1. a change in the genetic composition of a population over time as a result of random mating
  2. 3. proportion of individuals within the different species in a location
  3. 5. mistake in the copying process produces a random change in the genetic code
  4. 6. change in the genetic composition of a population over time
  5. 7. chromosomes are duplicated during reproductive cell division and a piece of one chromosome breaks off and attaches to another chromosome
  6. 10. Traits that improve an individual’s fitness are called
  7. 12. the process by which individuals move from one population to another
  8. 13. its ability to survive and reproduce