Question

what is a gene?
a section of a protein that codes for dna
the alternate version of a trait
the visible trait in the f₁ generation
a section of dna that codes for a specific trait

Explanation:

A gene is a fundamental unit of heredity. It is composed of DNA. Proteins are made based on the instructions from genes (not the other way around as in the first option). An alternate version of a trait is an allele. The visible trait in the \(F_1\) generation is the phenotype. A gene is specifically a section of DNA that contains the instructions (codes) for a specific trait.

Answer:

a section of DNA that codes for a specific trait