Question

In a monohybrid cross what will be percentage of heterozygous offspring in $F_4$-generation-

• A. 25%
• B. 50%
• C. 12.5%
• D. 6.25%.

Answer 1

The correct option is D 6.25%.

Suppose we take the genotypes Rr, in F2 generation we will get 2Rr, RR, rr, now in F3 generation a cross will take place between RR X Rr, Rr X Rr, Rr X rr, RR X rr, progeny will be 3RR, 3rr & 10Rr. For f4 generation percentage will be 10/16x 100= 6.25%.

So, the correct option is '6.25%'.