Answer 1

Monohybrid Cross	Dihybrid Cross
A cross between two pure organisms to study the inheritance of a single pair of contrasting characters.	A cross between two pure organisms to study the inheritance of two pairs of contrasting characters.
It produces a phenotypic monohybrid ratio 3:1 in the F2 generation.	It produces a phenotypic dihybrid ratio 9:3:3:1 in the F2 generation.
It produces a genotypic ratio 1:2:1 in the F2 generation.	It produces a genotypic ratio 1:2:1:2:4:2:1:2:1 in the F2 generation.
Example: Cross between tall and dwarf pea plants	Example: Cross of pea plants with round and yellow seeds and plants with wrinkled and green seeds