Which of the following proteins is an example of a tumor suppressor?

Researchers have identified some tumors that have no recurrent mutations or deletions in known oncogenes or tumor-suppressor genes and no detectable epigenetic alterations. However, these tumors often have large chromosomal deletions. What are some possible explanations that could account for the genetic causes behind these tumors?

Although cancer is not a contagious disease in humans or other vertebrates, there have been rare cases in which cancers have spread from one organism to another. Describe three cases of these contagious cancers and what conditions might have led to their appearance. For an introduction to this topic, see http://www.cancer.org/cancer/cancerbasics/is-cancer-contagious.

A mutation in a tumor suppressor gene causes what to happen?

True or False:Proto-oncogenes are mutated versions of oncogenes

How can mutations in non-coding segments of DNA contribute to the development of cancers?