Definition of Gene Interaction

Gene interaction is a phenomenon in which the two or more than two genes combine in order to produce such an effect that influences the outcome of a single trait. The dependence of expression of a gene on another gene that may be present or absent is also known as gene interaction.


Epistasis is the interaction of the genes that are located at different loci but affect the same character. One gene that is responsible to mask out the effect of the other gene is called epistatic gene whereas the gene which has bee masked out is termed as a hypostatic gene. This process is also referred to as inter-genic interaction.


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