Biology Semester B Final Review

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Across
  1. 2. Different forms of a gene
  2. 3. A process of reduction division in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell
  3. 7. System that maintains homeostasis and releases hormones
  4. 13. Adenine, ______, cytosine, thymine
  5. 14. ______ enzymes cut DNA into fragments
  6. 15. 2 different alleles for a trait
  7. 17. Non-sexual chromosomes
  8. 18. Domain that all eukaryotic organisms are classified into
  9. 20. Genetic makeup of a gene
Down
  1. 1. A picture of chromosomes lined up in size order
  2. 4. Physical characteristics of a gene
  3. 5. System that transports nutrients and waste
  4. 6. The process of DNA copying
  5. 8. Charles ______ proposed the currently accepted theory of evolution
  6. 9. An inherited characteristic that increases an organism's chance of survival
  7. 10. Survival of the ______, natural selection
  8. 11. Change in the genetic material
  9. 12. The principle of ______ states that some alleles are dominant and some are recessive
  10. 15. 2 identical alleles for a trait
  11. 16. System that protects and supports the body
  12. 19. DNA is a double ______ structure