Question

The total number of progenies obtained through the dihybrid cross of Mendel is 1280 in $F_2$ generation. How many of these are recombinants?

• A. 240
• B. 360
• C. 480
• D. 720

Answer 1

The correct option is C 480


In Mendel's dihybrid cross of $F_2$ generation, the phenotypic ratio is 9:3:3:1. In this ratio, out of 16 progenies, 10 progenies (9+1) show parental type whereas 6 progenies (3+3) show recombinant type. Therefore, the required number of recombinants out of 1280 progenies = $\frac{6}{16}\times 1280$ = 480.