At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
Chromosomes are paired long chains within a cell nucleus that are composed of genes (about 20,000 genes per chromosome pair), which are made up of the chemical substance called DNA. Genes on the chromosomes are made of segments of DNA which contain chemically coded messages resulting in the characteristics of an organism — including humans.
Not the answer you are looking for? Search for more explanations.
When a cell needs to duplicate, DNA strands are tightly coiled into chromosomes (chromosomes are made up of DNA and protein). Genes are certain stretches of DNA that code for a certain protein with a specific bodily function. On a chromosome, the location of the gene is called a locus.
DNA contains all the genetic material that decides a person's traits, such as hair color, eye color, etc. The DNA also passes on traits from the parents to the offspring, which is why children always have common traits with their parents. Genes carry the information needed to pass on these traits.
In summary, DNA, genes, and chromosomes are very similar in their 'composition', since genes are stretches of DNA that codes for certain proteins and chromosomes are made up of coiled DNA. Their functions are the same in the sense that they are all vital in passing on traits from the parent to the child, and therefore in determining the physical traits of the offspring.