In sweet pea, gene c is responsible for color production and gene p is responsible for the purple color pigment. both of them are located on two different loci on different chromosomes. the flowers will be purple only when the plant has the genotypes as c_p_. no color will be produced with genotypes: ccpp, ccpp, ccpp, ccpp. thus, gene c controls the expression of gene p.
what pattern of inheritance is exhibited here? (a)pleiotropy
(b)epistasis
(c)multiple alleles

The answer is epistasis.

Epistasis is the result of the interaction between two genes. It consists of the effect that one gene is dependent on the presence of the other genes. In this case, gene P is dependent on gene C, so the epistasis exhibited here.

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