The ability to taste the chemical PTC is determined by a sin

The ability to taste the chemical PTC is determined by a single gene in humans with the ability to taste given by the dominant allele Tand inability to taste by the recessive allele t. Suppose two heterozygous tasters decide to have children. 1. Predict the proportion of their children who will be tasters and nontasters. O 5096 O 25% O 75% O 100%

Solution

Part 1: Ans:75%

Details:

Both are hetreozyous tastors with either Tt or Tt phenotype, will be tastors to have a child. The probabilities are of phenotype of new baby are Tt, tt, tT and TT.

So out of 3 out of 4 will have possibility of tastors I.e. 75%

Part2:Ans:0%rough

Details: Here the cross will be in between homozygous smooth haired SS and ss.

Probability of next phenotypes are Ss , Ss, sS and sS hence no chance of rough haired one, I.e ss(0%rough haired)

Part3:Ans:TT

Details: Mother will be either TT or Tt but father will be tt as T is dominant for rolling tongue, which father don\'t have. Child will have fathers phenotype tt, and it is possibe only when mother will have genotype Tt.