I know that alpha and omegas and betas r males but can females be omega and alphas too?

I've read one where the mother of the male alpha (mc) was an omega.

I saw one BL(no English version yet), there's a gal is omega so she give the Uke her pills to save him.

I see
Thxs for the info

Which one was that one?

http://www.mangago.me/read-manga/oyasuminasai_no_ato_wa/

http://www.mangago.me/read-manga/tadaima_okaeri/
this maybe