Blood Type Genetics printable pdf download

Blood Type Genetics

B L O O D T Y P E G E N E T I C S

THEORY

Human blood type is caused by the presence of __________________________ (sugar proteins) embedded in the cell

__________________ of _______ blood cells (RBC’s). Two genes, located on _____________________

chromosomes, determine the blood type. For the most part, blood type is inherited as simple dominant or recessive

genes. For example, the gene that causes type ____ blood is dominant over the gene that causes type _____ blood.

But the gene that causes type ____ blood is equally dominant to that causing type _____. These genes, with equal

dominance, are said to be ________________________.

Knowing what blood type a patient has is important for blood _____________________. The blood received can be

rejected and attacked by the patient’s _______________ system. This is because, the glycoproteins on the RBC’s act

as _____________________ which stimulate an immune response which can lead to destruction of the RBC’s which

causes reduction of ____________-carrying ability and clumping of the blood (_______________________) which

can block blood vessels. Knowing which antigens (glycoproteins) are being introduced into a patient from a

_________ is critical.

There are four major blood types: _____, ______, ______ and ______.

PHENOTYPE

GENOTYPE

ANTIBODIES MADE

DIAGRAM

Red Blood

Note: 2 genes

Cell (RBC)

Anti-B

TYPE A

(dominant)

Normally you do not make

antibodies against your OWN

glycoproteins

TYPE B

(dominant)

TYPE AB

(codominant)

TYPE O

(recessive)

Blood Type Genetics