1.

What are the differences between monohybrid cross and dihybrid cross ?

Answer»
Monohybrid crossDihybrid cross
1) In monohybrid cross only one pair of contrasting characters are taken into consideration.1) In dihybrid cross two pairs of contrasting characters are taken into consideration.
2) In monohybrid cross, the phenotype ratio of F2 generation individuals is 3:1.2) In dihybrid cross, the phenotype ratio of F2 generation individual is 1:2: 1.
3) In monohybrid cross, the genotype ratio of F2 generation individuals is 1:2:1.3) In dihybrid cross, the genotype ratio of F generation individuals is 9 : 3 : 3 : 1.

-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


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