Question

3. In the experiment conducted by Mendel, RRyy (round green) and rrYY (wrinkled, yellow) seeds of pea plant were used. In the F2 generation 240 progeny were
produced, out of which 15 progeny had specific characteristics. What were the
characteristics ?

a) Round and green
b) Round and yellow
c) Wrinkle and yellow
d) Wrinkle and green​

Answer 1

When pea plant with round shaped seeds with yellow colour seed (RRYY) is crossed with another pea plant showing wrinkled shape with green cotyledons (rryy), the F

1 generation will have round shaped seeds with yellow colour seed (RrYy) progeny. When this is cross, the F

2 generation will have progeny in the ratio of 9 (round shaped seeds with yellow colour seed) : 3 (wrinkled shaped seeds with yellow colour seed) : 3 (round shaped seeds with green colour seed) : 1 (wrinkled shape with green cotyledons).

it might with help you to get a correct answer ok

Answer 2

phenotypic ratio of dihybrid cross  9:3:3:1=9/16:3/16:3/16:1/16

from this   240 × x/16 = 15

                                x=15×16/240=1

so the ratio will be 1/16 it represent wrinkled green