Biology Midterm 2: Genetics and Heredity
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Questions and Answers

What percentage of offspring from a heterozygous couple will be homozygous dominant?

  • 100%
  • 25% (correct)
  • 75%
  • 50%
  • What is the probability that a homozygous dominant person and a heterozygous person will produce a homozygous dominant offspring?

  • 100%
  • 75%
  • 25%
  • 50% (correct)
  • What is the chance that a daughter of a male with an X-linked recessive trait and a carrier female will be affected?

  • 25%
  • 100%
  • 50% (correct)
  • 75%
  • What is the relationship between the percentage of affected male offspring and carrier females in a cross between an unaffected male and a carrier female for an X-linked recessive trait?

    <p>The percentage of affected males will be the same as the percentage of carrier females</p> Signup and view all the answers

    What pattern of inheritance does a flower show when a cross between a white and a red flower produces a pink flower?

    <p>Incomplete dominance</p> Signup and view all the answers

    What type of trait is being traced in the given pedigree?

    <p>Autosomal recessive</p> Signup and view all the answers

    What is the probability that a heterozygous male and female will produce another homozygous recessive offspring after already having one?

    <p>25%</p> Signup and view all the answers

    If a flower cross results in 50% Purple and 50% Blue, what are the parents' phenotypes?

    <p>Red and Blue</p> Signup and view all the answers

    If a horse's fur color is codominant, what is the most likely phenotype of the parents if all four horses have patches of black and white?

    <p>One parent is black and the other is white</p> Signup and view all the answers

    What is the genotype of #9 if #8 mated with #3?

    <p>Heterozygous</p> Signup and view all the answers

    What is true about the offspring of #8 and #3?

    <p>Half the male offspring will be unaffected</p> Signup and view all the answers

    What pattern of inheritance is shown by the plant 'A' resulting from crossing a white plant with a red plant?

    <p>Incomplete dominance</p> Signup and view all the answers

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