What is the relationship between regulatory genes including

What is the relationship between regulatory genes, including tumor suppressor genes, in the development of cancer? Why are regulatory genes called both proto-oncogenes and oncogenes? What properties do cancer cells possess that are lacking in normal cells? What are the principal factors that contribute to the development of lung cancer? Of breast cancer? When should regular use of mammography begin, and which women should begin using it earliest? What are the steps for effective self-examination of the breasts and testicles? What is the status of breast self examination? What signs indicate the possibility that a skin lesion has become cancerous?

Solution

Explanation:

1) Cancer cell differs from normal cell in respective to cell growth,cell division,gene expression,protein expression,morphology,cell to cell interactions and in apoptosis(cell death).Cancer cells fails to have regulated cell division due to the altered gene expression by switching on or off the genes in an unwanted way(inducing gene silencing or activation),for example a gene that is not normally expressed in a normal cell is switched on and got expressed in high amounts can be because of mutation occured in gene or due to the changes occured in gene regulation during transcription or in translation.

2) Cancer cells varies in sizes and shapes and doesnot have a uniform size and shape as normal cells.