That's a great question. Online search says its from the Greek meaning generative and before that, origin.

https://en.m.wikipedia.org/wiki/Genetics#:~:text=11%20External%20links-,Etymology,%CE%B3%CE%AD%CE%BD%CE%B5%CF%83%CE%B9%CF%82%20genesis%20meaning%20%22origin%22.

So probably means the same sort of thing but the later discoveries took that name as well.