Dirty condenser coils, evaporator fan motor failure or a defective start relay switch are common freezer problems that cause the freezer to malfunction or not freeze. Frosted-over evaporator coils, a...
A pedigree is a table or chart recording a line of ancestors , either of persons or ( more especially ) of animals , as horses , cattle , and dogs ; in the case of animals , such a table is used as proof of superior qualities : a detailed pedigree.A genealogy is an account of the descent of a person or family traced through a series of generations , ...
Genetic counselors often make use of a diagram known as a pedigree, which is a tool for tracing a trait through generations of a family. By making a pedigree, it is often possible to predict whether a person is a carrier of a heredity disease. When you look at the chart note that: Females are circles, males are squares. Completely filled in circles or squares are affected, which means they have the trait you are mapping.