in humans, the trait for the ability to taste phenylthiocarbamide (PTC) is dominant over that for the inability to taste PTC.?

The trait for brown eyes is dominant over that for blue eyes. What proportion of the offsprings of two parents, each heterozygous for both traits, would be blue eyed tasters?

1 Answer

  • 4 years ago
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    If you're crossing BbTt x BbTt, the proportion of bbT_ would be 3/16.

    When doing a dihybrid cross, 9/16 are dominant for both traits, 3/16 are dominant for one and recessive for the other, 3/16 are the other way around, and 1/16 is recessive for both.

    This is a made up problem, since human eye color is not controlled by just 2 alleles.

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