Final answer:
Cancer is a genetic disease caused by mutations in genes that regulate the cell cycle. Inherited mutations, such as those in genes like BRCA1 and BRCA2, can increase the risk of developing certain types of cancer. Genetic testing can help identify these inherited mutations.
Step-by-step explanation:
Cancer is a genetic disease because it is caused by mutations in genes that regulate the cell cycle. These mutations allow cells with damaged DNA to divide uncontrollably and form abnormal masses of cells called tumors. While the majority of cancers are not caused by inherited factors, certain genetic mutations in genes like BRCA1 and BRCA2 can increase the risk of developing certain types of cancer, such as breast and ovarian cancer. Genetic testing can be done to identify these inherited mutations and help individuals understand their risk.