Question

What is the genotype ratio in monohybrid outcross for F2 generation?? 1)9:3:3:1 2)1:2:1 3)1:1 4)3:1

Answer 1

Answer:

ans= 1:2:1

Explanation:

since the phenotypic ratio for monohybrid cross is 3: 1

while genotypic ratio is 1: 2:1: or 1/4 : 1/2: 1/4

means 1 TT , 2Tt ( hybrid) , 1tt

Answer 2

Answer:

3) 1:1

Explanation:

In a monohybrid cross,

parents: TT × tt

F1: Tt Tt Tt Tt

Outcross (dominant back cross): progeny (F1) crossed with dominant parent

F1 with TT:

Tt × TT

F2: TT, Tt, TT, Tt

=> genotypic ratio is 1:1

* phenotypic ratio would be 1 since all F2 have at least one dominant allele