Answer:
Your answer might be Epistasis
Explanation:
Your question is a little unclear, but I think it might be
epistasis. This is where the expression of one allele combination is inhibited by another
eg
if a fruit has two Alleles one codes for red skin (R) and the other blue(r) but if a certain allele combination is present (ww) the fruit skin would be white despite having RR(red) genotype
