How many alleles exist for a given gene?
A) always one allele per gene
B) only two
C) each gene can have a different number of alleles
D) two from each parent

Question

Quizplus · Accepted Answer

Each gene can have a different number of alleles. While most genes have two alleles (one from each parent), some genes can have multiple alleles, meaning there are more than two possible variations of that gene's expression. For example, the ABO blood group gene has three alleles: A, B, and O.

How Many Alleles Exist for a Given Gene