question_answer

Genotypic ratio of a monohybrid cross is

A)  1:2:1         

B)  3:1

C)  9:3:3:1      

D)  1:1:1

Correct Answer: A

Solution :

 Monohybrid cross is made to study the inheritance of a single pair of allele. Monohybrid ratio is obtained in \[{{\text{F}}_{\text{2}}}-\]generation, when a monohybrid cross is made and the offspring of \[{{\text{F}}_{1}}-\]generation are self-breed. The genotypic ratio of monohybrid cross is 1:2:1, whereas the phenotypic ratio is 3:1. 9:3:3:1 is the phenotypic ratio lot dihybrid cross (the cross made to study the inheritance of two pairs of factors or alleles of two genes).