In addition to the proteins (agglutinogens) existing on your red blood cells, other genes make proteins called agglutinins (a-GLOO-tin-ins) that circulate in your blood plasma. Agglutinins are responsible for ensuring that only the blood cells of your blood type exist in your body.
Older children and teens are unlikely to start calling a stepmom mom or mother partly because of their fear of disloyalty to their biological mom. It is vital for all parties involved -- biological parents and stepmom -- to support their child's choice of what to call the stepmom.
Why shouldn't children have their mother's surname? Rebecca Hardy wanted her children to have her surname rather than their father's. She didn't think it was an especially radical idea â till some people got very upset ... When I was 12, there was a song by Everything But The Girl that made a lasting impression.