Question

What blood type has the Rh-negative factor?

Answer 1

Hint: Rhesus (Rh) factor is a protein, which is inherited from parents to their offspring and is present on the surface of red blood cells. If blood lacks this protein, then it has Rh-negative factor. If the blood has this protein, then it has Rh-positive factor. Rh-positive is the common blood type. But, possessing Rh-negative blood type is not an illness, which does not affect the health. However, the pregnancy is affected.

Complete answer:
Usually, the ABO blood system consists of four blood types.
Type A: It has an antigen known as A on the surface of red blood cells.
Type B: It has an antigen known as B on the surface of red blood cells.
Type AB: It has both A and B antigens
Type O: It has neither A antigen nor B antigen.
Based on Rh factor, the blood is further classified into Rh positive (Rh factor is present) and Rh negative (Rh factor is absent).
Hence, there are eight possible blood types.
A negative: It has an A antigen only.
A positive: It has both A antigen and RH factor, but B antigen is absent. It is one of the most common blood types, along with O positive.
O negative: It does not have A antigen and B antigen. Rh factor is also absent.
O positive: It does not have A antigen and B antigen. But it has Rh factor. This is the most common blood type.
B negative: It has B antigen only. A antigen and Rh factor are absent
B positive: It possesses B antigen and Rh factor. A antigen is absent
AB negative: It has both A antigen and B antigen. But, Rh factor is absent
AB positive: It has all three antigens – A antigen, B antigen and Rh factor.
Hence, the four blood types: A negative, O negative, B negative and AB negative have Rh-negative factor.

Note:
Special care is needed for pregnancy if the parent is Rh-negative and the baby is Rh-positive, since the issue of Rh incompatibility occurs. A baby may inherit the Rh factor from either parent. The Rh-negative persons exhibit less severe effects on the Toxoplasma parasite, compared to Rh-positive persons. In addition, they can be resistant to other viruses and parasites.