Question

how do we get the ratio 1:2:1 in punnett Square? give an example of showing the ratio

Answer 1

In the Mendel 3rd fillial Generation we get the ratio 1:2:1
EXPLANATION:
In cross pollinating the seeds of the character yellow and green seed of pure Breed we get 75%yellow and 25%Green
On self pollinating those resultant seeds we get 25% Homozygous yellow 50% Heterozygous yellow and 25% Homozygous Green that us of ratio 1:2:1......