Question

2. Mendel focused on traits that had two alleles (A or a) in which one was dominant and the other was recessive. Yet many genes may have multiple alleles. What is an example in your book of a gene that has multiple alleles

Answer 1

The example of a gene having multiple alleles is ABO blood system in human.

Explanation:

Sometimes the gene can have three or more alleles on the same locus, but in reality only 2 alleles are present in the individual.

It is a deviation from Mendel's law of inheritance.

There are three allelic forms of gene of blood group on the locus as A,B and O and have more than two phenotype for a gene.

Type  A (iA), Type B (IB), OR type O

the 3 combinations can give genotype of

type A, Type B, type AB or O BLOOD GROUPS.

Type A can be homozygous as IA IA or heterozygous as ( having one O allele) IAI

same genotype for B is also there.

Type O is recessive with two O alleles.

Since A or B type are equally dominnat they give rise to AB type.