Question

Pure homozygous offsprings in a dihybrid cross in the F${}_2$ generation would be ________.

• A. 1/2
• B. 1/4
• C. 1/8
• D. 1/16

Answer 1

The correct option is C 1/8

In F${}_2$ generation, 16 hybrids will be produced. Out of that, 2 are homozygous for the dominant (RRYY) as well as recessive (rryy). Therefore, out of 16, only 2 are homozygous.
The ratio between homozygous and heterozygous = 2:14
The ratio of pure homozygous offsprings to the total number of offspring= 2:16
Thus, the final ratio = 1:8 (Divide by 2)

So, the correct answer is option C.