Discounted Local DNA Paternity Testing

Blood Type Compatibility & Genetics

Human beings can have one of four primary blood types: A, B, AB, and O. O negative types work as universal donors, while AB positive types can accept transfusions of any blood.

Frequency of Blood Types in U.S.

  • O Positive – 38%
  • O Negative – 7%
  • A Positive – 34%
  • A Negative – 6%
  • B Positive – 9%
  • AB Positive – 3%
  • AB Negative – 1%

Upload each persons PICTURE Today & get Results Today!*

channel logos removebg preview
as seen on cbs   removebg preview
qd logo removebg preview

Compatibility of Blood Types

ABO type blood gets determined due to the absence or presence of A or B antigens on red blood cells. For example, someone with an A type blood possesses only the A antigen on their cells. B blood types have B antigens, while AB has both and O has neither. A person develops antibodies for the antigens they lack by the time they reach 6 months of age. This means that someone with an A blood type will develop antibodies against B blood types, and cannot receive transfusions of B type blood. Because of this, all facilities which offer blood transfusions must keep stock of all types.

Inheritance and Blood

Inheritance and Blood

ABO type blood gets determined due to the absence or presence of A or B antigens on red blood cells. For example, someone with an A type blood possesses only the A antigen on their cells. B blood types have B antigens, while AB has both and O has neither. A person develops antibodies for the antigens they lack by the time they reach 6 months of age. This means that someone with an A blood type will develop antibodies against B blood types, and cannot receive transfusions of B type blood. Because of this, all facilities which offer blood transfusions must keep stock of all types.

  • AA = A Blood Type
  • BB = B Blood Type
  • OO = O Blood Type
  • AO = A Blood Type
  • BO = B Blood Type
  • AB = AB Blood Type

Inheritance and Blood

The Rh factor of blood is merely a protein located on the outer layer of red blood cells. Red blood cells that have this protein become positive, while those that lack it become negative. As with blood types themselves, a person inherits their Rh factor from the parents. When paired together, the positive gene dominates the negative.

  • Neg/Neg = Negative Rh
  • Neg/Pos = Positive Rh
  • Pos/Pos = Positive Rh
parent child blood type chart
parent child blood type chart
negative positive chart
October 2024
MonTueWedThuFriSatSun
30123456
78910111213
14151617181920
21222324252627
28293031123