Question

examine the table below.

genotypes	phenotypes
bb or bo	type b blood
ab	type ab blood
oo	type o blood

why is blood type an example of multiple alleles?
it has four possible phenotypes (a, b, ab, and o).
it has four possible genes (a, b, ab, and o).
it has three possible genes (a, b, and o).
there are two genotypes possible for types a and b.
there are different blood types that cannot mix.

Explanation:

Multiple - allele traits are those controlled by more than two alleles. In blood type, there are three alleles (A, B, and O) that determine the phenotypes.

Answer:

It has three possible genes (A, B, and O).