From genotype to phenotype
![Fotolia 73595587 XS]( "Fotolia 73595587 XS.")
The genotype is all or part of the genetic information of an individual. This information is carried by the genome contained in every cell of an organism. The expression of the genotype produces the phenotype. The latter is all the observable characteristics of an individual at all levels: macroscopic, cellular or molecular. However, the genotype is not solely responsible for the phenotype. Indeed, this also depends on the environment in which the individual evolves. Identical twins, which, by definition, have the same genotype, may have different phenotypes. Imagine a situation where one of them is exposed to the sun while the other remains in the shade. The one who was exposed to the sun will produce melanin and develop tanned skin while the second will remain white. Their skin color will be different although they have the same genotype.
