Does this happen to u, The things u expect never happens and things which are unexpected happen instead?​

In familial hypercholesterolemia individuals homozygous for the allele causing the disorder completely lack receptors on liver cells that take up cholesterol from the blood stream. heterozygous have one-half the number of receptors while individuals homozygous for the normal allele are phenotypically normal. this is an example of a.epistasis b.complete dominance c. incomplete dominance d. codominance

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?