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Complementary Genes Example

A particular phenotype is controlled by the complementation of two dominant genes. As a result both the genes are necessary for the expression of a phenotype.

Example: In Lathyrus odoratus, Bateson and Punnet crossed two varieties (CCpp x ccPP ), each with white flowers. The F1 progeny had purple flowers (CcPp). The F2 offspring were in the ratio 9 purple : 7 white.
complementary genes interaction sweet pea cross

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