A cross was made between pure breeding pea plants, one with round and green seeds and the other with wrinkled and yellow seeds.
(a) Write the phenotype of F1 progeny. Give reason for your answer.
(b) Write the different types of F2 progeny obtained along with their ratio when F1 progeny was selfed. (Delhi 2014, Delhi 2013C)

(a) The cross in question was produced with two pea plants only used for breeding, one with round, green seeds and the other with wrinkled, yellow seeds.
Green seed colour and wrinkled seed shape are dominant to yellow seed colour and spherical seed shape. Recessive features are stifled in the F1 generation, while dominant traits are expressed.

Therefore, the phenotype of F₁ progeny is round and yellow.

(b) The different types of F₂ progeny obtained along with their ratio when F₁ progeny was selfed could be illustrated by the given cross.