Mutant Pigeon With Giant Legs

Each time that DNA is replicated, errors can be made. DNA is made up of “base pairs” and one base may be switched for another base, for example an A switched with a C. An extra base may be added or a base may be deleted. In more severe situations, an entire section of the genetic code can be deleted or moved to a different location. Depending on where in the DNA this mutation occurs, the effects of these mutations may vary from nonexistent to severe (see article “Understanding DNA” for more information on bases).