What is the difference between a trait with multiple alleles and a trait controlled by multiple genes?
I am so confused. I tried looking it up, rereading what it says in my textbook, and I'm still utterly confused. PLEASE HELP ME I'M FREAKING OUT
- RolandLv 77 years agoFavorite Answer
An allele is one version of a particular gene.
The ABO blood type gene has multiple alleles; A, B, and O.
Each one of us has 2 doses of that gene (1 from Mom and 1 from Dad).
So a person could have 1 of 6 possible combinations: AA, AO, BB, BO, AB, or OO.
Only 1 gene is involved.
A trait like skin color is controlled by multiple genes,
that is, by several different genes.
A person has 2 doses of EACH of those several genes,
BUT the resulting skin color is the sum of the interaction between
the products of all the alleles of all those genes.