“The Rh negative blood factor is recessive” — Rh factor is a second protein generated by a section on chromosome 9. Rh negative means the code isn’t there, and the protein doesn’t get produced. Assuming the main blood type considerations are taken into account, Rh positive people can receive Rh negative transfusions, but not the other way, if memory serves.
It’s been a while since I studied genetics but, I believe you’re right.
My Mum was RHneg. Family “lore” says we have some Blackfoot in us. I have learned that the two worldwide groups that have the highest occurrence of RHneg blood are the Basques (Iberian Peninsula) and the Blackfoot Indian (akaThe Blood). Go figure. I ain’t a scholar, but it makes me wonder about “blood brothers” and the oft seen movie shots of slicing palms and then shaking hands.