In a study scientist have found a connection between two gene variants that can cause breast cancer in a female if they have gone through a course of radiotherapy as a treatment for their cancer in childhood. After study they have found both chromosome and the position on those chromosomes. Chromosome 1 position q41; and chromosome 11 position q23. They have distinguished that these are the risk alleles because referring to the survivors of childhood cancer that did not receive radiotherapy; their alleles seem to not have an effect. Only times those alleles were affected is when radiotherapy was received as a child. More research has to be done to find other risk, but with the research better and safer methods to treat cancer may come out of it.