3/17 cancer; mitosis vs. meiosisPresentation Transcript
Do Now What are the similarities and differences between meiosis and mitosis? Hmmm…
Mitosis Similarities Meiosis
Meiosis Preexisting Cell(2N) Cell Duplicates its DNA here, too (4N) Cell divides (2N) Cells divides again (N) Know that meiosis divides twice! So 4N2NN Know that meiosis occurs in sex cells (sperm and eggs) UP TO THIS POINT, IT IS THE SAME AS MITOSIS!!!
AIM: How do cancer cells differ from other cells?
Cancer Disorder which body cells lose the ability to control growth Cancer cells do not respond to signals that regulate growth As a result, cancer cells divide uncontrollably
Cancer cells continue to divide and form tumors Tumor – a mass of cells Malignant tumor – invade and destroy surrounding tissues Benign tumor – do not spread to healthy tissue
What causes cancer? Defects in DNA, genes Exposure to radiation, tobacco, or viruses All types of cancer have one thing in common: control over the cell cycle control is broken.