What is the order of the genetic components?

The order of genetic components, from largest to smallest, is as follows: genome, chromosome, gene, and nucleotide. The genome is the complete set of genetic material in an organism, while chromosomes are structures within the genome that contain genes. Genes are segments of DNA that encode specific traits, and nucleotides are the basic building blocks of DNA, consisting of a sugar, phosphate group, and a nitrogenous base.