When we are talking of DNA, genes, we must remember that when a gene is transcripted to primary RNA it is formed by two types of segments, exons, and introns. Those coding are exons and those not coding are Introns. About these last (introns) there has been a wide discussion about its function, there are some who even call it junk DNA. Their function is not quite understood yet, there has been a recent increase in the interest in these noncoding sequences and several hypotheses regarding their function in the chromosome. It has been proposed that introns could motivate recombination and remotion of certain genetic groups through the evolutive process, recent evidence indicates that Introns contribute to maintaining stability, sometimes suppressing the activity of other genes, helping in the evolutive process.