Imagine that a chromosome was compared to a novel. Which of these would best represent a gene?

a. a letter of the alphabet

b. a sentence

c. a library of books

d. a chapter of the book

Answer: B, a sentence.

Since a chromosome contains tens of thousands of genes and is compared to a novel, it would only make sense for a gene to be less than a novel. We can eliminate C. D, chapter of the book is too generous.

A, on the other hand, contains is not generous enough.

Therefore, I think the answer should be B.