Which statement below defines epistasis?
a. when a single gene affects several phenotypes
b. a heterozygote displays a phenotype intermediate between its two alleles
c. a measurement of phenotype intensity
d. when one locus affects or covers the outcome of another locus

 The correct assertive is letter D. When one locus affects or coverbs the outcome of another locus.

Explanation:

  Epistasis is when alleles of one gene inhibit an action of alleles of another pair, which may or may not be on the same chromosome. The gene that exerts inhibitory action is called epistatic, and the gene that inhibits it is called hypostatic. This fact about epistasis is common among animals and plants.

hello there,

igneous rock formed from below the surface would have more crystals because

answer: because magma cools more slowly than lava

what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.