what is recessive epistasis..

what is complementary gene????????

Piyush
21 अप्रैल
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Shreya
21 अप्रैल

Recessive alleles at one locus (aa) mask the phenotypic expression of other gene locus (BB, Bb or bb) such epistasis is called recessive epistasis. The alleles of 'B' locus express themselves only when epistatic locus 'A' has dominant allele like AA or Aa. The phenotypic ratio is 9: 3: 4.