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

A gene is an order of nucleotides in DNA or RNA that encodes the structure of a gene product, either RNA or protein. During gene expression, the DNA is copied into RNA. The RNA can be directly functional or be the standard template for a protein that performs a function.

Explanation:

Shout out to Wikipedia.

D. a section of DNA that codes for a specific trait

Explanation:

got it right in edg 2021

see pic

answer; the above statement is (true);

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides