Exceptions to Simple Dominance: Codominance and Incomplete
Dominance - 0:54 Puzzling Tail Color Results - 1:23 ABO Human
Blood Type - 2:07 Multiple Alleles - 3:14 Codominance - 5:13
Universal Blood Donors and Recipients - 7:23 Incomplete
Dominance Did You Know… This lesson is part of a free course
that leads to real college credit accepted by 2,900 colleges.
Have you ever wondered what it means if someone is a universal
donor or acceptor of blood? See how genetic interactions play a
key role in this trait. Alright, so Adrian is feeling pretty
good now. He's already determined the genetic basis of two
flying hamster traits - coat color and ear size - and he found
that both traits are controlled by a single gene in which one
trait is dominant over a recessive trait. With a little help
from us, he's also rediscovered Mendel's laws, which taught him
that alleles on homologous chromosomes segregate into separate
gametes (Law of Segregation) and also that alleles of one gene
segregate independently of the alleles o