Answer
- proportion of taster offspring:-75%.
- all offspring taster chance - 63/64.
- all 3 nontaster - 1/64
- 2 taster , 1non-taster - 27/64.
Work Step by Step
Dominant Inheritance
- Non-Taster ( tt ) ( homozygous ).( Recessive trait ).
- Taster ( TT or Tt ) ( Dominant trait ).
Mating between 2 carriers ( Heterozygous parents , Tt )
genotype : Tt X Tt.
phenotype : taster X taster.
gametes : T, t, T, t.
offspring : 25% TT ( Taster ).
50% Tt ( Taster )
25% tt ( non taster )
i.e. 75% Taster & 25% non taster.
proportion of Taster offspring will be 75%.
- the family have 3 children:
chance all 3 children will be tasters is : 63/64.
chance all 3 children will be nontaster is : 1/64.
chance 2 will be tasters & 1 nontaster is : 27/64.
