What Is the Most Likely Reason That Alkaptonuria Is a Recessive

Multiple Choice

What is the most likely reason that alkaptonuria is a recessive disease?

A) The mutant phenotype arises from a change in the protein's amino acid sequence.
B) More than half the typical amount of homogentisic acid oxidase is needed to break down the toxin by-product.
C) Having half the typical amount of homogentisic acid oxidase is sufficient to break down the toxin by-product.
D) Homogentisic acid oxidase occurs early in the metabolic pathway.
E) Homogentisic acid oxidase occurs late in the metabolic pathway.