Biology Forum Genetics Genes

last updated by MrMistery 17 years ago
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    • #8781
      cvic1
      Participant

      In humans, the allele for brown eyes (B) is dominant over the allele for blue (b). A couple, one of whom has brown eyes and the other blue, have four children, all with brown eyes. Is this proof that the brown-eyed parent is homozygous dominant? Why?

    • #79287
      alextemplet
      Participant

      No because if the parent is heterozygous (Bb) then it’s still possible for all four children to inherit the same dominant gene. Unlikely, but possible.

    • #79315
      MrMistery
      Participant

      Update: the 1-gene, 2 alleles hypothesis for the inheritance of eye color is history

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