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In a dihybrid crossm if you get 9:3:3:1...

In a dihybrid crossm if you get `9:3:3:1` ratio it denotes that

A

the alleles of two genes are interacting with each other

B

it is a multigenic inheritance

C

it is a case of multiple allelism

D

the alleles of two genes are segregating independently

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The correct Answer is:
D
Cross involving two contrasting characyers is called dihybrid cross or a two factor cross. The two factors of each trait assory at random and independent of the factors of other traits at the time of meiosis (gametogensis) and get randomly as well as independently rearranged in the offspring producing both parental and new combinations of traits. The explained the law of independent assortment given by Mendel.
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