Question

A cross was made between pure breeding pea plants one with round and green seeds and the other with wrinkled and yellow seeds. 

(i) Write the phenotype of F₁ progeny. Give reason for your answer. 

(ii) Write the different types of F₂ progeny obtained along with their ratio when F₁ Progeny was selfed.

Answer 1

(i) The cross was made between round, green seeds ar..d wrinkled, yellow seeds 

In the given cross, two traits were taken into account, which is a dihybrid cross. 

Yellow colour and round shape is dominant over green colour and wrinkled shape.

The above cross shows round and yellow seeds in the F₁ generation. It occurs because dominant traits (round and yellow) express itself, whereas recessive traits (wrinkled and green) get suppressed.

(ii) On selfing of F₁ generation: