Wild - type
"Normal, nonmutant form of an organism; the form found in nature (i.e. in the wild)" .
When writing out Punnett squares the symbol used to signify the wild type is a +.
The Drosophila fruit fly was one of the first organisms to be researched for the wild type theory. This was done by a scientist called Thomas Hunt Morgan who discovered in an isolated population the majority of fly’s had red eyes but only a small few had white eyes therefore these were termed the mutant and the red eye fly’s being the most common phenotype in the population were termed the wild type. 
- ↑ Bruce Alberts, Alexander Johnson, Julian Lewis, Martin Raff, Keith Roberts, Peter Walter (2008) Molecular Biology of THE CELL. 5th ed. United States of America, Garland Science.
- ↑ Daniel L. Hartl, Maryellen Ruvolo (2012) Genetics, Analysis of Genes and Genomes. 8th ed. USA. Higher Education
- ↑ Wild Type - Gene, Phenotype, Mutation, and Genetic - JRank Articles . 2014. Wild Type - Gene, Phenotype, Mutation, and Genetic - JRank Articles . [ONLINE] Available at: http://science.jrank.org/pages/7387/Wild-Type.html. [Accessed 28 November 2014].