Chapter 7 Self Quiz: Genes and Inheritance

  1. If the two alleles of a gene differ, the organism is ________, and the ________ allele determines the organism's ________.
    1. heterozygous, dominant, genotype (wrong)
    2. heterozygous, dominant, phenotype (correct)
    3. homozygous, dominant, phenotype (wrong)
    4. homozygous, recessive, phenotype (wrong)
    5. homozygous, dominant, phenotype (wrong)
      Hint
  2. The offspring between a true-breeding purple and a true-breeding white pea plant are
    1. 100% purple (correct)
    2. 100% white (wrong)
    3. 100% pink (wrong)
    4. 1/4 purple (wrong)
    5. 1/4 white (wrong)
      Hint
  3. To determine the genotype of an organism with the dominant phenotype, a testcross can be made with an individual with the
    1. same genotype (wrong)
    2. same phenotype (wrong)
    3. heterozygous genotype (wrong)
    4. heterozygous phenotype (wrong)
    5. recessive phenotype (correct)
      Hint
  4. In snapdragons, pink-flowered plants are produced when red-flowered plants are crossed with white-flowered plants. This is an example of
    1. simple dominant and recessive traits (wrong)
    2. codominance (wrong)
    3. incomplete dominance (correct)
    4. aneuploidy (wrong)
    5. recessive dominance (wrong)
      Hint
  5. In human blood types, an individual with IAi genotype has type ________ blood.
    1. A (correct)
    2. B (wrong)
    3. AB (wrong)
    4. O (wrong)
    5. A or O (wrong)
      Hint
  6. In human blood types, type AB individuals are universal recipients because
    1. they produce neither A nor B antibodies (correct)
    2. they produce both A and B antibodies (wrong)
    3. they produce only O antibodies (wrong)
    4. their red blood cells have no antigens (wrong)
    5. their red blood cells have the O antigen (wrong)
      Hint
  7. A male inherits the color-blind allele from
    1. his father only (wrong)
    2. his mother only (correct)
    3. both parents (wrong)
    4. either parent at 50% probability (wrong)
    5. neither parents (wrong)
      Hint
  8. A color-blind female mates with a normal-sighted male. What is the probability a son will be color-blind?
    1. 0% (wrong)
    2. 25% (wrong)
    3. 50% (wrong)
    4. 75% (wrong)
    5. 100% (correct)
      Hint
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