Question

Use the information gathered in the Epistasis animation to answer the question. Although both dominance and epistasis involve masking of gene expression, they are different from each other. What is the major difference?
Dominance involves masking of one phenotype by another whereas epistasis involves masking of both phenotypes.
Dominance involves a gene that dominates whereas epistasis involves a gene that represses its own expression.
Dominance involves one allele masking another at the same locus whereas epistasis involves one locus masking a different locus.
Dominance is very common in gene expression whereas epistasis is a very rare phenomenon.

Answer 1

Dominance involves one allele masking another at the same locus whereas epistasis involves one locus masking a different locus.

Explanation:

Epistasis is a type of gene interaction in which one gene masks or modifies the expression of another gene at a distinct locus.

Dominance refers to the gene interaction in which one allele of a given gene masks the expression of another alllele of same gene.

The comparison of dominance and epistasis give the following  information:

• Dominance  involves  allelic suppression while epistasis involves non-allelic suppression.
• Dominance involves a single pair of alleles while epistasis involves two pairs of allele.
• In dominance, the expression of recessive allele is suppressed while in epistasis, either recessive or dominant  non allele is suppressed.
• The effect of dominance is due to the dominant allele while epistasis may be due to dominant or recessive allele.