Question

Blood types and the markers associated with each blood types

Answer 1

Answer

- Markers are the antigens present on the surface of red blood cells.

Based on ABO system

There are 4 blood types based on ABO system :

Type A : It has marker 'A'

Type B : It has marker 'B'

Type AB : It has markers 'A and B'

Type O : This type do not have any markers as it does not have antigens on the surface of their RBCs.

Based of Rh factor

Another marker is Rh factor.
The blood type that has Rh antigen or marker is known as Rh positive and the one that lacks this Rh factor is known as Rh negative.

Based of Rh factor, there are 8 blood groups.

A positive : It has A marker as well as Rh marker

B positive : It has B marker as well as Rh marker

​​​​​​​AB positive : It has A and B markers as well as Rh marker

​​​​​​​O positive : It do not have A or B markers but do have Rh marker.

A negative : It has A marker but no Rh marker.

B negative : It has B marker but no Rh marker.

AB negative : It has A and B markers but no Rh marker.

O negative : It do not have A or B and Rh marker.