All cancer cells occur because of gene mutations. A mutation is a change or error that occurs in the deoxyribonucleic acid (DNA; the complex set of instructions that tells every cell in a person's body how to function). Genes are the basic biologic units passed from parent to child that provide information about a person's physical characteristics, such as eye color or risk of getting a certain disease. Genes are located on chromosomes (strands of DNA). Each cell in a person's body contains about 20,000 to 25,000 genes. They are located on 46 chromosomes, which are arranged in two sets of 23 chromosomes—one set inherited from the mother and one set inherited from the father. One chromosome in each set of 23 determines whether a person is female or male (these are called the X and Y chromosomes). The other 22 chromosome pairs, called autosomes, determine other physical characteristics.
This website give us information about the genetics of cancer, how the genectics's factors can cause cancer to someone. Please click here http://www.cancer.net/all-about-cancer/genetics/genetics-cancer for more information.
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