When two non-allelic genes produce a new phen | vedclass

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(D) Complementary genes are two non-allelic genes that interact to produce a specific phenotype, which neither gene can produce on its own. For exampl

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Complementary genes

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(D) Complementary genes are two non-allelic genes that interact to produce a specific phenotype, which neither gene can produce on its own. For example, in the sweet pea $(Lathyrus \, odoratus)$, the production of purple flower color requires the presence of two dominant genes ($C$ and $P$). If either gene is absent (e.g., $ccPP$ or $Ccpp$), the flower remains white. Thus, these genes complement each other to express the trait.

When two non-allelic genes produce a new phenotype when present together, but fail to do so independently, what is this phenomenon called?

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