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Principles Of Inheritance And Variation

Question
CBSEENBI12046939
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Gene which suppresses other gene's activity but does not lie on the same locus is called as

  • epistatic

  • supplementary

  • hypostatic

  • codominant

Solution

A.

epistatic

The phenomenon by which a gene suppresses the phenotypic expression of a non- allelic gene is called epistasis. In F2 generation, the ratio for epistatic gene is 12 : 3. 

The alleles which do not show dominant recessive relationship and are able to express themselves independently when present together are called co- dominant alleles.

Supplementary genes are a pair of non- allelic genes, one of which produces its effect independently in the dominant state while the dominant allele of the second gene is without any independent effect. Although, it is able to modify the effect of the former to produce a new trait.

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