The correct arrangement from smallest to largest is:
Gene, DNA, Chromosome
Here's the reasoning:
- A gene is a segment of DNA that contains the instructions for making a specific protein or set of proteins.
- DNA (deoxyribonucleic acid) is the molecule that carries genetic instructions, and it is made up of many genes.
- A chromosome is a structure that consists of DNA wrapped around proteins, containing many genes.
So the correct answer is: Gene, DNA, Chromosome.