Genetics Review

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Across
  1. 4. neither allele is dominant; phenotype is a blend of both traits
  2. 12. three or more forms for a single trait
  3. 14. a trait that is always expressed
  4. 15. a trait not in genes but picked up from the environment
  5. 19. two letters expressing the types of genes
  6. 20. two identical alleles
  7. 21. one factor from a pair of genes
  8. 22. used to determine all possible outcomes of a genetic cross
Down
  1. 1. a number that describes how likely it is an event is to occur
  2. 2. neither allele is recessive; both phenotypes expresssed
  3. 3. an organism with a genotype that has an allele not expressed in the phenotype
  4. 5. the base that pairs with guanine
  5. 6. cell division that results in 2 identical daughter cells
  6. 7. a trait that is hidden by a dominant trait
  7. 8. the physical appearance of a gene
  8. 9. A, B, AB, or O
  9. 10. two different alleles for a gene
  10. 11. cell division that results in 4 genetically different daughter cells
  11. 13. pairs with cytosine
  12. 16. 46 in humans
  13. 17. the base that pairs with adenine
  14. 18. traits passed on from parent to offspring
  15. 19. a segment of DNA on a chromosome that codes for a specific trait
  16. 21. pairs with thymine
  17. 22. controlled by two or more genes