They will then grow on medium lacking histidine. Only 1 is expressed in any given tumor. One type is Li-Fraumeni syndrome. Also several others. Many breaks, tendency to breast cancer.
Cancer is a progressive disease.
A mutation that transforms the cell, leaving it capable of unrestrained growth. Cervix is multilayerd tissue with a basal membrane. Normally, all cell division occurs only in layer next to basal membrane. With dysplasia, patches of cells multiply above the basal membrane. Seen in Pap smear.