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Question
Epistasis and complementary genes are different. Justify the statement with reason.
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Solution
Epistasis genes are those two separate pairs of genes, where a gene masks or inhibits the expression
of another non-allelic gene. The gene that masks the effect of another
is said to be epistatic to the other and the gene whose expression
is prevented is said to be hypostatic.
On the other hand, complementary
genes are those two separate pairs of genes that interact to produce the
phenotype in such a way that neither dominant is expressive unless the
other one is present. The effect of one dominant must be complemented by
the other dominant for expression. The dominant phenotype is thus
expressed only when dominant genes of both pairs are present.
Epistasis genes are those two separate pairs of genes, where a gene masks or inhibits the expression
of another non-allelic gene. The gene that masks the effect of another
is said to be epistatic to the other and the gene whose expression
is prevented is said to be hypostatic.
On the other hand, complementary
genes are those two separate pairs of genes that interact to produce the
phenotype in such a way that neither dominant is expressive unless the
other one is present. The effect of one dominant must be complemented by
the other dominant for expression. The dominant phenotype is thus
expressed only when dominant genes of both pairs are present.
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