Bromosomes are like regularchromosomes; strands of DNA, but that contains genes that determine your broism. Depending on theses genes, you are either a bro or a broser.
Doctor Broski: I'm sorry Mark, your bromosomes tell us that you are a tool.
Mark: Is there any cure?
Doctor Broski: No, I'm afraid you're going to be like this the rest of you life.
When you have a male friend or homie, also called a brother or bro, that is cool or awesome. The combination of the two words is Brosome, or the female version, Brasome. Its can be used as a noun or adjective.