A) epistasis genes
B) holandric genes
C) operator genes
D) antiepistasis genes
Correct Answer: A
Solution :
According to Barr body concept (applicable only for X-chromosomes) genes present on the Barr body (inactive X-chromosome) are at times hypostatic due to presence of epistatic genes on the active X-chromosome. Thus, epistasis gene is the most appropriate option. Genes which are located on X-chromosome only are called hologynic genes and those found on Y-chromosome only are called holandric genes.
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