Add Yahoo as a preferred source to see more of our stories on Google. A person's blood type is determined by "the presence or absence of certain antigens – substances that can trigger an immune ...

When I was filling out a volunteer application for a children's hospital and was asked my blood type, I had to think twice. Though I was pretty sure it was O-positive, I wanted to confirm, so I called ...

Several genes with varying inheritance patterns are involved in determining your blood type. The most significant gene is the ABO gene which determines your ABO blood type. Like many of your physical ...