Question

Why can multiple alleles result in many different phenotypes for a trait?

Answer 1

Multiple allelism:

1. When more than 2 alternative forms of a gene occupy the same locus on a chromosome, it is called multiple allelism.
2. Here, more than 2 alleles are governing the same character.
3. This can result in many phenotypes for a trait.
4. The more allele options for a particular gene, the more is the possibility of combinations and hence more possible phenotypes.
5. Example - ABO blood group
6. Multiple alleles can be found only when population studies are made.