This pedigree is of an autosomal recessive trait or disorder. The completely orange square represents a male that is homozygous recessive and has the trait. All of the half-shaded individuals are carriers; they do not exhibit the trait because it is recessive, but they could pass it on to their offspring if their partner is also a heterozygote. Autosomal recessive disorders include Cystic Fibrosis and Tay-Sachs Disease.