Question

In a cross if round shape of seed is a dominant trait and wrinkled seed is a recessive trait , determine the phenotype of the progeny if the parents of the following genotypes are crossed
(a)Rr * Rr
(b)rr * Rr
(c)RR * Rr

Answer 1

Answer:

In pea plant form of seed is of two types: Round(R) which is a dominant trait and Wrinkled(r) which is a recessive trait. In F

1

generation, Mendel cross-pollinated a pure round pea( RR) and a pure wrinkled pea(rr). He called them parental generation. He collected the seeds produced by this cross and grew plants from them. All these plants were found to be round.

The F

1

plants were pollinated among themselves called selfing. The F

2

plants were found to contain both round and wrinkled individual. They were in the ration of three round and one wrinkle.

So, the genes for the traits of parents are pure round(RR) and pure wrinkled(rr).

Explanation:

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