Eminent scientist E Premkumar Reddy said that mutation at a specific point in the regulatory genes cycle would lead to formation of tumours or cancer. This was discovered by him during his research
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/cancer-causing-gene-discovered
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/deccan-chronicle-hyderabad
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health