"Fascinating...Controversial...Another great contribution. With The GenoType Diet Peter D'Adamo is taking it one level past where most of us stop. He has a virtually encyclopedic knowledge of this topic."
Requires that both parents carry traits for the gene in order for it to be passed to their offspring. If both parents carry the gene (heterozygous) than there is a one in four chance of having an offspring with the complete disease and a 50% chance of the child being at least a carrier (heterozygous--like the parents).
