Question

why example sweet pea in caseof the complementary genes

Answer 1

$\mathbb{\red{\huge{Heya\:mate}}}$

$\boxed{Here\:is\:your\:@nswer}$

━━━━━━━━━━━━━━━━━━━
$\mathfrak{\blue{Answer.}}$Complementary genes are the genes which are present on different genetic loci but interact with each other to express a single character in combination. That is they both together produce a particular phenotypic trait in an individual. ... Complementary geneaction is an example for epistatic geneinteraction.
━━━━━━━━━━━━━━━━━━━

$\mathbb{\huge{\green{Hope\:it\:helps!!}}}$