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Question

In Pea plant, a round seed is dominant over the wrinkled. If a cross is carried between these two plants, give the answer to the following questions.

Mention the genes for the traits of parents.

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Solution

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 F1 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 F1 plants were pollinated among themselves called selfing. The F2 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).

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