The Most Likely Explanation for the Observation That Round Is

Multiple Choice

The most likely explanation for the observation that round is dominant to wrinkled in Mendel's peas is

A) the round allele encodes a functional enzyme, the wrinkled allele encodes a defective enzyme, and the round trait could arise with only one functional gene for the enzyme.
B) the wrinkled allele encodes a functional enzyme, the round allele encodes a defective enzyme, and the wrinkled trait could arise with only one functional gene for the enzyme.
C) the wrinkled allele encodes a functional enzyme, the round allele encodes a defective enzyme, and the round trait could arise with only one functional gene for the enzyme.
D) the round allele poisons the wrinkled allele.
E) the round allele has an uppercase letter.