Question

A gene pair hides the effect of another. This phenomenon is known as
A) Epistasis
B) Dominance
C) Mutation
D) None of the above

Answer 1

Hint: In every human body, chromosomes come in matching sets of two or in pairs. Each chromosome contains many genes. Genes also appear in pairs.

Complete answer :
The basic and functional unit of heredity is called Gene. Gene is made up of DNA and it contains hereditary information. Now you need to understand what a gene pair is? In a diploid cell, when two copies of a particular gene are present it is known as a gene pair. Since chromosomes come in pairs, each of these two copies of the gene will be present one in each chromosome set.
In our body, some genes have the capability to mask the expression of other genes. This makes one gene more “dominant” than the other and tries to produce a new trait. These types of genes are known as epistatic genes. Hence, the phenomenon in which when one gene pair hides the effect of another gene pair, it is known as epistasis. Due to this, only one of the genes will be able to express themself.
Dominance is the process in which one gene suppresses the expression of characters by another gene. This is opposite of epistasis.
Mutation happens when an inheritable change occurs due to a change in chromosomes and genes.

Hence the correct option is A epistasis.

Note:Every person owns two copies of each gene, one derived from each parent. In humans, a cell nucleus comprises 46 unique chromosomes or 23 partners of chromosomes. There are six types of epistasis.