Please help me with this genetics problem, I will reward 91 Points. :((((
About 70% of Canadians get a bitter taste from the chemical phenyl thiocarbamide (PTC), while the other 30% do not. The ability to taste this chemical (T) is a dominant characteristic, while taste-blindness to it is recessive (t). Tongue-rolling ability is dominant (R), while the inability to roll the tongue is recessive (r). A tongue-rolling woman who is taste-blind for PTC has a father who could not roll his tongue but could taste the PTC chemical. She marries a man who can taste PTC but cannot roll his tongue. His mother was taste-blind to the chemical. Show the possible children this couple could produce. Use a Punnett square to illustrate your answer.