Which of the following properties of carbon distigunishes it from all other elements?
question 6 options:

a.carbon has six protons in its nucleus

b.carbon is a gray solid at room temperature

c.carbon forms comounds with oxygen

d.carbon can be found in earth's crust

The property that distinguishes carbon from all other elements is that it has six protons in it's nucleus. :)

Recessive epistasis

Explanation:

Epistasis is a gene interaction it influences a phenotype. Genes can mask each other effect with one been dominant over the other or they can both be expressed to produce a new trait.

It is the conditional relationship between two genes that can determine a single traits. When there are two alleles that dictate phenotypes they can affect one another such that allele of one gene is recessive to one that is a dominant allele over the other.

A recessive epistasis occur when a recessive allele mask the expression of both recessive and dominant allele of another locus. Allele for white color mask the effect of other alleles expressing itself over them to give a phenotypic ratio of 9:3:4 a deviation from normal mendelian principle.

When a dominant allele masks the effect of both dominant and recessive alleles at another locus, it is a dominant epistasis.