What proportion of offsprings in the F2 generation of a tetrahybrid cross will resemble the phenotype of parents that produce the F1 hybrid?

Question

What proportion of offsprings in the F2 generation of a tetrahybrid cross will resemble the phenotype of parents that produce the F1 hybrid? (A) 1 / 128 (B) 1 / 256 (C) 1 / 1024 (D)  1 / 64

Tardigrade Admin · Accepted Answer

The total number of offsprings in the F2 generation is represented by 4n, where n = 1 for monohybrid, n = 2 for dihybrid, etc. Thus the total number of offsprings in the F2 generation of tetrahybrid cross is 44 = 256. Out of these only two offsprings will resemble the parents genotypically. Thus their proportion is 2/256, which is 1/128.

Q. What proportion of offsprings in the $F_{2}$ generation of a tetrahybrid cross will resemble the phenotype of parents that produce the F1 hybrid?

$1/128$

$1/256$

$1/1024$

$1/64$

Q. What proportion of offsprings in the F2​ generation of a tetrahybrid cross will resemble the phenotype of parents that produce the F1 hybrid?

1/128

1/256

1/1024

1/64

Q. What proportion of offsprings in the $F_{2}$ generation of a tetrahybrid cross will resemble the phenotype of parents that produce the F1 hybrid?

$1/128$

$1/256$

$1/1024$

$1/64$