When I was a student at Syracuse University in my Genetics lecture class of more than 140 I scored number 2 on the mid term exam, and got an A for the course. Cleft lip phnomena is generally thought of as a simple recessive. That is what I was taught. However it may also in some cases follow laws of simple blended inheritance? And with high levels of radioactivity in the soil it may show up in some people who would not ordinarily pass it along. I do not know? Some of the richest deposits of Uranium ore in the world have been discovered in the Northville, N.Y. area. And medical studies on cleft lip in the area ceased after those discoveries. Also with Leonard Lawton and Elizabeth Carr there are marriages with women who may have had ancestors in that wild mountain area before there were any records at all. And the simple recessive may not have been passed by Laughton - Lawton. It is not that simple.