in most abo, all alphas, male and female, have penises and can knot. and all omegas have ovaries. female alphas also have vaginas and ovaries, they just have a lower chance of getting pregnant. meanwhile male omegas also have penises and testes but they have higher chances of getting pregnant than by impregnating someone.
idk enough abt recessive vs dominant, esp in this universe cuz those terms mean different things in different stories. but i based what i said off the general info pages they include at the start of most abo stories from when they were first getting popular and people needed context. when i said "female alphas have a lower chance of getting pregnant" i meant specifically in comparison to betas and omegas based on what I've read, esp in lesbian stories (or the rare mom backstory lol). but theres not a lot of stories about female/male couples in the abo universe so really its up to the author on the fine details. you're right abt the male omegas having a harder time getting pregnant now that i think about it, most abo featuring male omega also feature pregnancy so i mistook that as a statistical constant lol
Qq if it’s an alpha woman and an omega man, how does the omega man get pregnant?