These are general cancer texts and you can find out what they are through Janus. One of these books, Cancer the misguided cell, has a chapter on genes and protein synthesis that would provide good background for today's class. There are different possibilities. First we'll list the possibilities. Group of cells starts to behave abnormally 2.
Single cell becomes abnormal and then it divides to form the whole tumor.
One or more abnormal cells influence adjacent cells. We will find the answer because of a phenomenon called X-inactivation. During development, the egg that has been fertilized by the sperm starts to divide. It divides and divides until there is the number of cells you have when you're an adult. At a certain stage of development there will be 1000 cells, much fewer than you have now.