Which of the following is the best description for Epistasis?
A. A recessive allele that controls the expression of a dominant allele in a different trait.
B. Two alleles keeping each other in equilibrium.
C. When two dominant alleles are present and are both expressed equally.
D. A state of being very close to equilibrium, but not quite there.

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[tex]\huge\underline{\underline{\boxed{\bm {Answer:}}}}[/tex]

○ [tex] \large\tt{A.}[/tex] A recessive allele that controls the expression of a dominant allele in a different trait.

◉ [tex]\large \tt{B.}[/tex] Two alleles keeping each other in equilibrium.

○ [tex]\large \tt{C.}[/tex] When two dominant alleles are present and are both expressed equally.

○ [tex] \large\tt{D.}[/tex] A state of being very close to equilibrium, but not quite there.

[tex]\huge\underline{\underline{\boxed{\bm {Explanation:}}}}[/tex]

An epistasis is a relationship between two genes or alleles in which one gets masked or hidden by the other. It is different from dominant and recessive alleles because epistasis has an alternative phenotype to the normal phenotype.