1 A-wing fighter in the Encyclopedia (link now obsolete; backup link on Archive.org) 2  A-wing fighter in the Databank (First identified as Green Squadron (Rebel Alliance)) â 3  Star Wars Episode VI Return of the Jedi. â  Star Wars: Shattered Empire, Part I.
A gene mutation is a permanent alteration in the DNA sequence that makes up a gene, such that the sequence differs from what is found in most people.Mutations range in size; they can affect anywhere from a single DNA building block (base pair) to a large segment of a chromosome that includes multiple genes.n some cases, the mutation occurs in a personâs egg or sperm cell but is not present in any of the personâs other cells. In other cases, the mutation occurs in the fertilized egg shortly after the egg and sperm cells unite.
A condition that is caused by mutations in one or more genes is called a genetic disorder. There is a group of rare diseases caused by mutations in one gene at a time. These are called single-gene disorders. But most common diseases are caused by a combination of gene changes, lifestyle choices, and your environment.