Do genes always have a particular locus?

This definition merely expands on the central dogma of genetics and recognizes that a gene product need not be a protein, and a gene need not be a particular locus on a chromosome. The DNA sequence that results in a gene product can be split and be present on one or several chromosomes. Also, any DNA sequence can result in one or more products.

This definition recognizes that some prokaryotes have RNA genes. In other words, the genetic material need not be DNA. Again, we can view this as a simple expansion of the central dogma of genetics.

The definition does not spell out what is meant by functional product. It would seem, then, that sequences of DNA resulting in regulatory RNAs or proteins could be considered genes.