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6 Written questions

6 Multiple choice questions

  1. a cross between individuals that involves one pair of contrasting traits
  2. a condition in which a trait in an individual is intermediate between the phenotype of the individual's two parents because the dominant allele is unable to express itself fully (different dominance)
  3. describes the allele that is fully expressed when carried by only one of a pair of homologous chromosomes (brown eyes)
  4. the ratio of phenotypes produced by a cross
  5. an organism's appearance or other detectable characteristic that results from the organism's genotype and the environment
  6. describes a trait or an allele that is expressed only when two recessive alleles for the same characteristic are inherited (blue eyes, shows up in the F2 generation)

6 True/False questions

  1. Complete dominancea relationship in which one allele is completely dominant over another

          

  2. Alleleone of the alternative forms of a gene that governs a characteristic, such as hair color (genes occur in pairs-two letters, each letter is an allele)

          

  3. Genotypic ratiothe ratio (fraction) of the genotypes that appear in offspring

          

  4. Homozygousdescribes an individual that has identical alleles for a trait on both homologous chromosomes (both alleles are alike)

          

  5. True-Breedingdescribes a trait or an allele that is expressed only when two recessive alleles for the same characteristic are inherited (blue eyes, shows up in the F2 generation)

          

  6. P Generationparental generation, the first two individuals that mate in a genetic cross (parents)