A (1) shows the inheritance of a particular trait over several generations. An organism with two of the same (2) v for a particular trait is said to be (3) for that trait. An organism with two different (4) for a particular trait is heterozygous for that trait. When alleles are present in the (5) state, the (6) trait will be observable. An individual who is heterozygous for a (7) disorder is called a carrier. Examples of recessive genetic disorders in humans are (8) and (9) .