One Reason Dysfunctional Alleles Can Have Such Specific Effects on the Workings

Multiple Choice

One reason dysfunctional alleles can have such specific effects on the workings of our sensory systems is that

A) only one allele has a significant effect on each system.
B) the toxicity of dysfunctional alleles degrades the action of the entire brain.
C) our sensory systems rely on the functioning of more than one protein.
D) only a single allele needs to be dysfunctional to result in a deficit.