Why hasn't natural selection eliminated the Rhesus negative gene?

Subject: Why hasn't natural selection eliminated the Rhesus negative gene?

Date: Fri May 18 11:06:19 2001
Posted by Stephen
Grade level: grad (science) School: No school entered.
City: No city entered. State/Province: No state entered. Country: UK
Area of science: Evolution
ID: 990198379.Ev

Message:


Without modern medicine, an Rh- woman who has children by a Rh+ man is likely 
to lose any babies after the first, due to blood incompatability. This is a 
severe selective disadvantage. Since it's not uncommon, must the Rh- gene have 
some known or unknown selective advantage to balance this?

Re: Why hasn't natural selection eliminated the Rhesus negative gene?

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