What is meant by variable expressivity in genetics?
a the product of one gene controls the expression of another gene.
b a certain percentage of individuals with a particular genotype fail to express the associated phenotype.
c a single genotype produces a range of phenotypes that differ in the degree or magnitude of expression of the particular trait specified by the gene.
d a single genotype produces multiple distinct phenotypes that affect different functions.

C A single genotype produces a range of phenotypes that differ in the degree or magnitude of expression of the particular trait specified by the gene.

Explanation:

Variable expressivity refers to the range of signs and symptoms that can occur in different people with the same genetic condition.

For example, the features of Marfan syndrome vary widely— some people have only mild symptoms (such as being tall and thin with long, slender fingers), while others also experience life-threatening complications involving the heart and blood vessels. Although the features are highly variable, most people with this disorder have a mutation in the same gene (FBN1).

answer; i believe that the best answer is (secondary cardiac arrest due to

there are mainly three domains in biological classification namely; archaea, bacteria, and eukarya.

archaea includes all the prokaryotic cells which are characterized by their lipid membranes. they have branched hydrocarbon which is attached to glycerol through an ether linkage.

bacteria includes all the prokaryotic cells, the cell membrane of which are made up of the unbranched fatty acid chain. in addition, they are attached to glycerol through an ester bond.

eukarya includes all the eukaryotic cells, that is, the cells contain a nucleus and other membrane-bound cell organelles.

they can be autotrophic as well as heterotrophic, unicellular as well as multicellular

they include kingdoms like protista, plantae, animalia, fungi et cetera.

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explanation: