Question

what is the Chakkar board for the F1 generation​

Answer 1

The F1 generation is 100% hybrid. When RRyy crosses with rrYY, all were Rr Yy with round and yellow seeds in the first generation. The Round and Yellow seeds are the dominant characters.

Answer 2

"If the allele T is crossbred with t, T stands for tall trees and t stands for dwarf tress,

The phenotype obtained in the P1 or parental generation will be all tall trees, that is, Tt, Tt, Tt and Tt

Now in the F1 or first filial generation, the phenotype will be as follows:

TT, Tt, Tt and tt. So the phenotypic ratio between tall and dwarf trees will be 3: 1

"