Add to table of contents: Blood Lab Page 52 Blood types Page 53

1. Dominant/recessive 2. Codominant Blood Types Pg. 53 Human blood genes show 2 kinds of inheritance: 1. Dominant/recessive 2. Codominant

There are 4 human blood types: O = i i A = IA IA or IA Ii Blood Types Pg. 53 There are 4 human blood types: O = i i A = IA IA or IA Ii B = IB IB or IB Ii AB = IA IB

The universal donor is: The universal acceptor is: Blood Types Pg. 53 The universal donor is: O The universal acceptor is: AB

The approximate distribution of blood types in the U. S The approximate distribution of blood types in the U.S. population is as follows: O-positive: 38 percent. O-negative: 7 percent. A-positive: 34 percent. A-negative: 6 percent. B-positive: 9 percent. B-negative: 2 percent. AB-positive: 3 percent. AB-negative: 1 percent.

Rhesus (Rh) factor is an inherited protein found on the surface of red blood cells. If your blood has the protein, you're Rh positive. If your blood lacks the protein, you're Rh negative. During pregnancy, problems can occur if you're Rh negative and the baby you're carrying is Rh positive. Usually, your blood does not mix with your baby's blood during pregnancy. However, during delivery or certain times during pregnancy, a small amount of your baby's blood could come in contact with your blood. If you're Rh positive, Rh incompatibility isn't a concern. If you're Rh negative and your baby is Rh positive, however, your body might produce proteins called Rh antibodies after exposure to the baby's red blood cells. The antibodies produced aren't a problem during the first pregnancy. The concern is with your next pregnancy. If your next baby is Rh positive again, your body will produce Rh antibodies that can cross the placenta and damage the baby's red blood cells. This could lead to life-threatening anemia, a condition in which there are not enough red blood cells. If this condition is not prevented, each Rh positive baby you carry after your first pregnancy might have severe anemia.

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