A) one pair of genes can completely mask the expression of another pair of genes
B) on pair of genes independently controls a particular phenotype
C) one parr of genes enhances the phenotype expression of another pair of genes
D) many genes collectively control a particular phenotype
Correct Answer: A
Solution :
When presence of one allele can mask the expression of allele of a different gene, this type of gene interaction is called, epistasis. The gene or locus, which suppressed or mashed the action of gene is called, epistatic gene, and the gene or locus which is suppressed is called, hypostatic gene According to Mendels law of independent assortment one pair of genes (two pair of alleles) assort independentaly. Such genes, which are non-allelic and affect the phenotype of a single quantilative trait are called, polygenes or cumulative genes and their inheritance as polygenic inheritance.
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