CBSE Class 10 Answered

Tall plant with red flowers                     Dwarf plant with white flowers

        TTRR                                                                     ttrr ........................  Parents

           ↓                                                                           ↓

          TR                                                                          tr    .......................   Gametes

a) These gametes on fusion gives TtRr plants in the F₁ generation. Their phenotype will be tall plants with red flowers.

b) The gametes obtained by selfing the plants of F₁ are:  TR, Tr, tR, tr

c)

So the ratio of plants in F₂ generation is 9 (Tall plant red flowers) : 3 (Tall plant white flowers) : 3(Dwarf plant red flowers) : 1 (Dwarf plant white flowers)