I need help understanding epistatic gene Gene D Gene C Epist

I need help understanding epistatic gene

Gene D Gene C Epistasis analysis, Feeding experiment 6. (1 point) If you analyze the feeding behavior of the met Cand met D auxotrophs, 4/7 will not grow when fed cystathionine and 3/7 will, as shown in the table below. Table II Genotype Grow on minimal? Grows with Cystathionine? 9 C. D no supplement needed. 3 cc D 1 ccdd Which mutant is epistatic in terms of feeding behavior? Met D Met C 123

Solution

There is that one gene or allele masking the phenotypic expression of the other genes or alles in the interaction.That gene or allele masking the effect is called epistatic.Epistasis may be dominant or recessive.

Dominant epistasis is when the dominant allele of one gene masks the effect of either allele of the other gene.

In recessive epistasis the recessive allele of one gene masks the effect of either allele of the other gene.