Question

l.8.2.a formative 1
which statement best describes dnas relationship to a gene and chromosome?
a gene is a short section of dna, and a chromosome is made from dna.
dna is made of chromosomes, and a gene contains dna.
dna is coiled into a chromosome, and a gene holds the chromosome together.
a gene contains several chromosomes, and chromosomes are made from dna.

Explanation:

To solve this, we analyze the relationships:

• A gene is a short segment of DNA that codes for a trait.
• Chromosomes are structures made up of DNA (along with proteins), and they carry many genes.
• Option 1: "A gene is a short section of DNA, and a chromosome is made from DNA." matches these definitions.
• Option 2 is wrong because DNA is not made of chromosomes (chromosomes have DNA).
• Option 3 is wrong because genes don’t hold chromosomes together (chromosomes are held by proteins like histones).
• Option 4 is wrong because a gene does not contain chromosomes (chromosomes contain genes).

Answer:

A. A gene is a short section of DNA, and a chromosome is made from DNA.