Genes which have no phenotypic effect when present separately but interact to produce a particular phenotype are called

complementary genes

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polygenes

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supplementary genes

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epistatic genes

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Solution

The correct option is A complementary genes
one of two or more genes that when present together produce effects qualitatively distinct from the separate effect of any one of them.

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Genes that are similar in phenotypic effect when present separately, but together interact to produce a different trait and ratio is 9 : 7 in F $_{2}$ generation. Such genes are known as

Q. Nonallelic genes having similar phenotypic effect, interact to produce a different trait and a ratio 9 : 7 in

F_{2}

generation are

Q. Two nonallelic genes produce the new phenotype when present together but fail to do so independently then it is called:

Q. Two non-allelic genes produce the new phenotype when present together but fail to do so independently then it is called as

Q. Match the columns I and II.

Column I	Column II
Pleiotropic gene	Both allele express equally
Codominance	Change in nucleotide
Epistasis	One gene shows multiple phenotypic expression
Mutation	Non - allelic gene inheritance

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Genes which have no phenotypic effect when present separately but interact to produce a particular phenotype are called

The correct option is A complementary genes one of two or more genes that when present together produce effects qualitatively distinct from the separate effect of any one of them.

The correct option is A complementary genes
one of two or more genes that when present together produce effects qualitatively distinct from the separate effect of any one of them.