Agglutination reactions are similar in principle to precipitation reactions they depend on the crosslinking of polyvalent antigens. Just as an excess of antibody inhibits precipitation reactions, such excess can also inhibit agglutination reactions; this inhibition is called the prozone effect.

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#Unit 8. Inheritance Biology

Gene Interaction with Epistasis

The effect of gene interaction is that one gene masks (hides) the effect of another gene at a different locus.

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RECESSIVE EPISTASIS

The recessive allele of one gene hides the expression of all alleles of another gene. Ex- coat color in Labrador retrievers

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Bombay phenotype

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#Unit 8. Inheritance Biology

Supplementary genes:

Two independent dominant genes interacting to produce a phenotypic expression different from that produced by either gene alone.