Question

During a dihybrid cross with contrasting characters in the F${}_2$ generation parental genotypes will appear in ............. ratio.

• A. $\frac{1}{16}$
• B. $\frac{2}{16}$
• C. $\frac{3}{16}$
• D. $\frac{9}{16}$

Answer 1

The correct option is B $\frac{2}{16}$

The genotypic ratio in the $F_2$ generation for a dihybrid cross is 1:2:1:2:4:2:1:2:1 out of which 1/16 genotype is homozygous dominant and 1/16 genotype is homozygous recessive. So, the ratio of parental genotype is 2/16.

So, the correct answer is option B.