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Principles Of Inheritance And Variation

Question
CBSEENBI12047554

In Mendelian monohybrid cross, phenotypic ratio in F2 is 3 :1. How many types of gametes are formed in F1 -generation?

  • Two types

  • Four types

  • Eight types

  • Only one types

Solution

A.

Two types

Parents-                       RR        x            rr

Gametes-                      R         x            r

F1 generation-                          Rr

F2 generation-                

  R r
R RR Rr
r Rr rr

 

Red : White = 3 : 1