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Draw a Punnett square representing the cross between a heterozygous individual and a homozygous recessive individual...

  1. Draw a Punnett square representing the cross between a heterozygous individual and a homozygous recessive individual for gene A. Assume that gene A is inherited in a normal Mendelian fashion and assorts independently.
    1. What are the chances that these two individuals would have offspring that are…
      1. AA?
      2. Aa?
      3. aa?

    1. What alleles are in each of the gametes (sperm & eggs) for the heterozygous individual?
    2. Now let’s practice using the “rule of and.” What are the chance of the offspring from this cross being male AND Aa?
  2. Draw a dihybrid Punnett Square representing the cross between two individuals both heterozygous for gene C (C is the allele for brown hair, and c is the allele for white hair) and heterozygous for gene D (D is the allele for long eyelashes, and d is the allele for short eyelashes). Assume that both genes are inherited in a normal Mendelian fashion and assort independently.
    1. What is the probability of the offspring having brown hair?
    2. What is the probability of the offspring having both long eyelashes and brown hair?
    3. What are the allele combinations in the gametes for these parents?
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