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Across 1. Mutations in regulatory genes can be caused by ______. 5. ____ is when an injured cell explodes. 6. Mitosis creates two ____. 7. ____ mutations are random absences or additions in a gene. 11. ____ can cause cancer. 15. Asbestos, cigarette smoke and benzene are all examples of ____. 16. ____ is when you have inflammation of the digestive tract. 17. ____ chromosomes line up at the cells equator. 18. The process when one cell becomes 4 sperm or 4 egg cells.

Down 1. ____ is a protein that are needed to carry out oxygen throughout the body. 2. _____ tells a cell to stop dividing. 3. _____ such as hepatitis or HPV can cause mutations in regulatory genes. 4. When cells can become different kinds of cells such as skin cells and brain cells 7. ____ can divide to become any kind of tissue. 8. The last step of mitosis is ____ when the cells separate. 9. Heart cells, muscle cells and bone cells are all ____. 10. The only cells that go through miosis are ____. 12. What cell type has a life span of two days? 13. ___ is the way to add more cells so the body can grow and develop, regenerate and replace old cells. 14. _____ from x-rays or UV light from the sun can cause mutations.