Question

show the cross of(RRYY×rryy).Also tell the phenotypic and genotypic ratio​

Answer 1

punnet square is given in the above pic

Both the product rule and the Punnett Square approaches showed that a 9:3:3:1 phenotypic ratio is expected among the progeny of a dihybrid cross such as Mendel's RrYy × RrYy. (Genotypic ratio is difficult and not also important for 10th board if you are in 10th ,I told you this for general information)

Genotypic ratio of dihybrid cross :1:2:1:2:4:2:1:2:1. hope that helps!