Question

Differentiate between Mendel’s monohybrid cross and dihybrid cross.

Answer 1

	Monohybrid Cross	Dihybrid Cross
1.	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.
2.	It produces a phenotypic monohybrid ratio of 3:1 in the F2 generation.	It produces a phenotypic dihybrid ratio of 9:3:3:1 in the F2 generation.
3.	It produces a genotypic ratio of 1:2:1 in the F2 generation.	It produces a genotypic ratio of 1:2:1:2:4:2:1:2:1 in the F2 generation.
4.	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