Two types of breeding methods are used to know the working of gene and analyze how certain traits are inherited from grandparents and parents. They are monohybrid and dihybrid. A monohybrid cross is defined as the cross happening in the F1 generation offspring of parents differing in one trait only. A dihybrid cross is a cross happens F1 generation offspring of differing in two traits. Below are the differences between monohybrid and dihybrid based on the genotype, phenotype, cross test ratio, etc.
| Monohybrid | Dihybrid |
| Means | |
| Mono refers to single and hybrid means mixed breed | Di refers to two or double and hybrid means breed |
| Cross | |
| Monohybrid cross is used to study the inheritance of a single pair of alleles | Dihybrid cross is used to study the inheritance of 2 different alleles |
| Used to study | |
| the dominance of genes | Offspring assortment |
| Genotype ratio | |
| 1:2:1 | 1:2:1:2:4:2:1:2:1 |
| Phenotype ratio | |
| 3:1 | 9:3:3:1 |
| Ratio cross test | |
| -1:1 | -1:1:1:1 |
To get an in-depth understanding of Monohybrid And Dihybrid register to BYJU’S. Keep visiting BYJU’S for latest updates on various Biology topics.
See Also
6.1: Dihybrid CrossesSOLVED: What does a phenotype ratio of 3:1 among offspring in a
monohybrid cross indicate?
The alleles that govern one trait assort into gametes together
with the alleles that govern another trait.
It indicates that the alleles governing the phenotypes ha3:1 Ratio - Biology As PoetryThe phenotypic ratio for Mendel’s dihybrid cross isSome important links:
| Monohybrid Cross | Law Of Inheritance |
