PTC tasting is a dominant trait.?

Finn and Maggie both can taste PTC but their daughter, Celia, cannot. If Finn and Maggie have another child what is the probability that the child will not taste PTC?

1

0

3/4

1/2

1/4

2 Answers

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  • 7 years ago
    Favorite Answer

    1/4. Since "tasting" is dominant, it can be represented by T. If they have a daughter that is not a taster, her genotype must be tt. Finn and Maggie must be heterozygous, Tt. Therefore, the Punnett square is:

    _____T_____t___

    T____TT___Tt___

    t_____Tt___tt___←Celia

    So, there is a 1/4 chance of any child being a non-taster, regardless of how many children they have; the probability is always the same.

    Source(s): 40 years teaching Biology and basic Genetics
  • Anonymous
    7 years ago

    yes ptc tasting is a dominant trait.and there is always 50% chances of people that can taste it

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