Question

Write a difference between Monohybrid and Dihybrid.

Answer 1

The inheritance of one pair of contrasting characteristics 'tallness' and 'dwarfness' of the pea plants by their first generation and second generation is called monohybrid cross.
Whereas
The inheritance of two pairs of contrasting characteristics of a pea plants us called dihybrid cross.
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Answer 2

Mono hybrids are a cross between two purebred organisms of the same species for the study of one single pair of alleles.

Di hybrids are cross between two purebred organisms but of different species for the study of inheritance of two different characteristics.

mono hybrids produce phenotypic ratio of 3:1 and genotypic ratio of 1:2:1 in F2 generation.

Dihybris, on the other hand, produce phenotypic ratio of 9:3:3:1 and genotypic ratio of 1:2:1:2:4:2:1:2:1.