What are genes and BRCA1 & BRCA2?
We have approximately 25,000 genes in every cell of our body. Genes are our body’s instructions and determine how our body functions, develops and is maintained. Genes come in pairs and each gene has a code, which can be thought of as a long sentence with thousands of letters. Changes in this code can stop the gene working and are called mutations. Mutations in some genes, such as BRCA1 & BRCA2 can increase the risk of certain types of cancer because normally these genes prevent cancer by repairing mistakes in the cells.