Chapter 14 Review: 19629/5025122

  1. Punnett square practice

  2. Pedigree practice
  3. Assume complete dominance. The cross at right indicates the individual with orange eyes is
    1. heterozygous. (wrong)
    2. homozygous recessive. <==== correct
    3. homozygous dominant. (wrong)
    4. codominant. (wrong)
    5. incompletely dominant. (wrong)
      (Why? )

  4. If the two alleles at a locus differ, the organism is ________, and the ________ allele determines the organism's ________.
    1. heterozygous, dominant, genotype. (wrong)
    2. homozygous, dominant, phenotype. (wrong)
    3. homozygous, recessive, phenotype. (wrong)
    4. homozygous, dominant, phenotype. (wrong)
    5. heterozygous, dominant, phenotype. <==== correct
      Hint
  5. Alternative versions of genes are called
    1. alleles. <==== correct
    2. chromosomes. (wrong)
    3. chromatids. (wrong)
    4. gametes. (wrong)
    5. phenotypes. (wrong)
      Hint
  6. A cross of heterozygous individuals that produces a 1:2:1 ratio in the offspring for both genotype and phenotype demonstrates
    1. complete recessiveness. (wrong)
    2. complete dominance. (wrong)
    3. incomplete dominance. <==== correct
    4. codominance. (wrong)
    5. heterodominance. (wrong)
      Hint
  7. A heterozygous individual who does not exhibit the recessive phenotype is called a(n)
    1. aneuploid. (wrong)
    2. carrier. <==== correct
    3. dominant. (wrong)
    4. dihybrid. (wrong)
    5. truebred. (wrong)
      Hint
  8. In the law of segregation, the two alleles for a heritable character end up in different
    1. chromosomes. (wrong)
    2. chromatids. (wrong)
    3. gametes. <==== correct
    4. somatic cells. (wrong)
    5. pedigrees. (wrong)
      Hint
  9. A testcross of a purple-flowered pea with a white-flowered pea yields 3 white and 1 purple offspring. The genotype of the purple parent is
    1. homozygous purple. (wrong)
    2. homozygous white. (wrong)
    3. homozygous purple or white. (wrong)
    4. heterozygous. <==== correct
    5. impossible; offspring should be 1:1. (wrong)
      Hint