Question

The ability to taste the chemical PTC is due to a single gene in humans.

Answer 1

0:3:1

Explanation:

Tasters have the dominant allele for the itter taste of PTC, they can be homozygous TT and heterozygous Tt.

Non-tasters are supposed as autosomal recessive characters

they are homozygous recessive tt when expressed

Given in the equation two heterozygotes parents would produce offspring with the trait in the following ratio.

Tt (parent 1)

Tt (parent 2)

 If a punnet square is made

    T      t

T  TT    Tt

t    Tt     tt

The phenotypic character is in the ratio of 0:3:1

There will be 25% chances of recessive trait of non-tasters in the progeny of heterozygous parents.