Mutations of the BRCA1 and BRCA2 genes have been linked to hereditary breast and ovarian cancer.

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It was thought that having these mutations, to the BRCA1 and BRCA2 genes, could make healthy cells less able to repair any damage caused by radiotherapy.

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Along the way two breast cancer genes, BRCA1 and BRCA2, were discovered in 1994 and 1995.

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The case involved Myriad Genetics, which holds the patent rights on two genes, BRCA1 and BRCA2, that are associated with increased risks for breast and ovarian cancer.

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For example, 23andMe tests for some gene variants involved in mildly raising breast cancer risk, but not genes called BRCA1 and BRCA2 that vastly raise breast cancer risk.

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He has created free software that analyzes the genome for 68 mutations in the BRCA1 and BRCA2 cancer genes, which raise the risk of breast and ovarian cancer.

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First, though, let me remind readers that the genes in question, BRCA1 and BRCA2, are linked to an increased risk of breast and ovarian cancer, a risk that was first discovered in 1994 by scientists at the University of Utah.

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Ms Morgan said that following the identification of two key genes in the last decade (BRCA1 and BRCA2) genetic testing could now pinpoint whether a woman may be at high risk of developing breast cancer.

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The service does not include rare genes that dramatically boost disease risk, such as BRCA1 for breast cancer.

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At the moment, doctors know about a number of genes which predispose someone towards developing cancer, such as the BRCA1 gene in breast cancer.

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