Human Anatomy, Physiology, and Medicine. Anything human!
Minor blood types? Each group has 4 subgroups. There is O1, O2, O3 and O4. All of them can be Rh pozitive or Rh negative. Is this what you mean?
i asked this before, and i am asking again
What causes the blood subgroups?
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
The answer to your question may lie in this article. I felt it would be easier to post the URL than to try to simplify the article. http://www.owendot.com/Health_Science/B ... types.html
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