In the ABO Blood Type System the Alleles I^A,I^B,and I

Question

In the ABO blood type system the alleles I^A,I^B,and i produce A) two phenotypes. B) one phenotype. C) four phenotypes. D) type A and type B blood types only. E) three phenotypes.

Accepted Answer

The three alleles in the ABO blood type system (I^A, I^B, and i) can combine in many different ways to produce four different phenotypes: Type A, Type B, Type AB (which occurs when an individual inherits both the A and B alleles), and Type O (which occurs when an individual inherits two copies of the i allele). Therefore, the correct answer is C, which reflects the fact that the ABO blood type system produces four different phenotypes.

In the ABO blood type system the alleles IA,IB,and i produce

In the ABO blood type system the alleles I^A,I^B,and i produce