different versions of the same gene are known as
A gene is a section of DNA which controls part of a cell's chemistry - particularly protein production. in the same places. But there are different versions of the same gene. Different versions of the same gene are called alleles (pronounced 'al-eels'). For example, the gene for eye colour has an allele for blue eye colour and an allele for brown. For any gene, a person may have the same two alleles or two different ones. Recessive or dominant alleles