Question

PLEASE HELP BY TONIGHT: The ability to taste phenylthiocarbamide (PTC) is controlled in humans by a single dominant allele (T). A woman who is a nontaster married a man and they had three children, two boy tasters and a girl nontaster. All the grandparents were tasters. Create a pedigree of this family of this trait. Solid symbols should signify nontasters. Where possible, indicate whether the tasters are TT or Tt.

Answer 1

Answer:

T (TT)

|

Tt

/ \

Tt tt
/

TT Tt

Step-by-step explanation:

In this pedigree, the solid symbols (circles or squares) represent nontasters (tt), and the open symbols (circles or squares with a horizontal line) represent tasters (TT or Tt). The parents of the three children are both tasters (Tt), and both sets of grandparents are tasters (TT). The two boys are tasters (TT or Tt), and the girl is a nontaster (tt).