I should have said this was in the 1960s so we were very lucky. Markorie Sent from my iPad > On 23 Jan 2017, at 22:22, Marjorie Ward via DERBYSGEN <[email protected]> wrote: > > Thank you for that explanation Alan. I am negative and my husband positive and I have been rather surprised that all our four children were positive. Fortunately for us we had no problems with the births. Like their Father they are also right handed unlike me. :) > > Marjorie Ward > > Sent from my iPad > >> On 23 Jan 2017, at 18:32, Alan Bloor via DERBYSGEN <[email protected]> wrote: >> >> Rh positive is a dominant gene so you only need one copy to be Rh positive. Your husband clearly has one positive gene and one negative, because you had a Rh negative child (which requires two Rh negative genes). A couple where the husband has two Rh positive genes and the wife is Rh negative will only have positive children. As for passing Rh negative type down the generations, it doesn't necessarily follow - both partners need to have at least one Rh negative gene to have a negative child. Hope that makes sense. >> >> Sent from my Windows Phone >> >> ------------------------------- >> To unsubscribe from the list, please send an email to [email protected] with the word 'unsubscribe' without the quotes in the subject and the body of