Question

Ina certain plant, yellow fruit (Y) is dominant to white fruit (y). A heterozygous plant with yellow fruit crossed with a plant with white fruit. Find the genotype and phenotype ratios.

Answer 1

Genotype ratio: 1:1

Phenotype ratio: 1:1

Explanation:

A heterozygous plant with yellow seed would be having alleles Yy

where Y is dominant yellow colour and y is white fruit.

Yy X yy

   y    y

Y Yy  Yy

y yy   yy

The phenotype ratio from Punnett square is 1:1 as 50 per-cent will be yellow coloured and 50 per-cent will white coloured fruits.

       Genotype ratio will be 1:1