Over Lappping Genes - Most genes do not share information with other genes in the perfect sense. They are discrete, non-overlapping units.

In contrast, some genes code for more than one protein or polypeptide; such genes are called as overlapping genes.

Overlapping genes share some of the same sequences.

In principle, genes can overlap at two levels.

In bacterial systems and other situations where space conservation is necessary, genes may overlap at the level of the reading frame, so that the same information is used to generate two or more unrelated proteins.