Question

Explain monohybrid and dihybrid ratio.​

Answer 1

Hello Mate,

Monohybrid cross is a cross involving only one pair of contrasting character.

Example : TT for tall and tt for small phenotype.

Dihybrid cross is a cross involving two pairs of contrasting character.

It is a cross between two pure organisms in order to study the inheritance of two pairs of contrasting characters.

1. It produces a phenotypic monohybrid ratio of

3:1 in F2 generation.

2. It produces a phenotypic dihybrid ratio of 9:3:3:1 in F2 generation.

Answer 2

Monohybrid cross is a cross between parents differing in only one trait or in which only one trait is being considered. Dihybrid cross is a cross between parents in which two pairs of contrasting characters are studied simultaneously for the inheritance pattern.