Question

Which among the following are correct statements regarding the F${}_2$ generation obtained in Mendelian dihybrid cross?
(a) Phenotypic ratio 9 : 3 : 3 : 1
(b) Genotypic ratio 4: 2: 2: 1: 2: 1: 2: 1: 1
(c) $\frac{1}{4}$ plants are completely heterozygous.
(d) $F_2$ generation is obtained through selfing of $F_1$ plants.

• A. a, c, d
• B. a, b, c, d
• C. b, c, d
• D. a, b, c

Answer 1

The correct option is B a, b, c, d

All four statements are correct.
(a) Phenotypic ratio 9 : 3 : 3 : 1
(b) Genotypic ratio 4: 2: 2: 1: 2: 1: 2: 1: 1
(c) $\frac{1}{4}$ plants are completely heterozygous.
(d) $F_2$ generation is obtained through selfing of $F_1$ plants.