Parent pea plants were crossed for contrasting traits, i.e. round and wrinkled seeds. The progeny obtained in F 1 -generation is Rr, RR, Rr and rr. Which of these are dominant and recessive traits?

Tall plan (RR) : dominant trait

Wrinkled seed (rr) : recessive trait


From the above given progeny obtained in the F1 generation :


1 RR: dominant


2 Rr: dominant


1 rr: recessive


the ratio would be - 1:2:1


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