Please tell me, are certain types of cancer genetic?

Yes, there are many: We only know of a genetic cause for about 1/20 cancers. Most cancers causes that we know of are environmental, (sun, smoking, sexual transmission, etc.). There are no cancers which are exclusively genetic, but the risk of many cancers can be transmitted genetically.

Cancer: Many cancers occur sporadically. Breast cancer, ovarian cancer, retinoblastoma, familial colon adenomatosis polyposis , hereditary nonpolyposis colorectal cancer, multiple endocrine neoplasia ii, multiple endocrine neoplasia i, cowden's syndrome, familial melanoma, neurofibromatosis, von hippel-lindau, ; li-fraumeni syndrome can be genetically linked.

Yes (; maybe/partly): There have been genetic mutations identified associated with significant increased risk of certain cancers. Brca1/2 mutations are responsible for ~ 10-15% of all breast cancers and also link other cancers (ovarian, colon, prostate, pancreatic). The vast majority of cancers are considered sporadic. They are likely related to multiple genetic predispositions and lifetime exposures/experiences.