Question

Match the following of column I with that of column II (considering the condition of the cross YY X yy till $F_2$ generation).

Column I	Column II
a. Yy in $F_1$	p. 50%
b. Yy in $F_2$	q. 25%
c. Homozygous dominant in $F_2$	r. 100%
d. Varieties with dominant phenotype in $F_2$	s. 75%

• A. a - s, b – p, c – q, d – r
• B. a - s, b – q, c – p, d – r
• C. a - r, b – p, c – q, d – s
• D. a - r, b – q, c – p, d – s

Answer 1

The correct option is C

a - r, b – p, c – q, d – s

As shown in the cross above, in the $F_1$generation all the offspring would be of the genotype Yy. In ${F_2}^{}$ generation, homozygous dominant (YY) would be 25%, heterozygous dominant (Yy) would be 50%, and hence the dominant phenotype percentage would be 75%.