When do cells undergo mitosis

Something that increases the likelihood of developing a disease is called a risk factor. There are several risk factors for various types of cancers. Mitosis Chromosomes carry genetic information in a molecule called DNA. Cell division Cells divide when: an organism grows organisms need to replace worn-out cells organisms need to repair damaged tissue During these processes, the cell undergoes a type of cell division called mitosis. What causes cancer? Lifestyle factors Viruses linked with cancer, such as the human papilloma virus HPV , being spread from person to person through sexual intercourse.

The chemical carcinogens in cigarette smoke increasing the risk of lung cancer. Alcohol intake is linked with certain cancers. Exposure to ultraviolet radiation , part of which is ionising , during sunbathing or outdoor activities, leading to the development of skin cancers.

A poor diet with increased fat and salt intake, as well as the consumption of certain foods, can increase the risk of cancer. Other chapters in Help Me Understand Genetics. Genetics Home Reference has merged with MedlinePlus. Learn more. The information on this site should not be used as a substitute for professional medical care or advice.

Contact a health care provider if you have questions about your health. How do cells divide? From Genetics Home Reference. Mitosis and meiosis, the two types of cell division. Purposes of mitosis: How do cells duplicate themselves, and why? In all complex multicellular organisms eukaryotes , cell duplication occurs by a process called " mitosis " or cell division. Cells divide for two reasons:.

Interphase : Each chromosome undergoes replication, making an identical copy of itself. At this point, the chromosomes are still long and thin, and are not visible inside the nucleus.