d99

Hello, I'm wondering how genetics fall into play from the grandparents and great grandparents when having children? For example, my partner has a very sick family (sister has dead kidneys, father has parkinsons disease, mother has arthiritis, grandparents on both sides died from cancer along with the great-grandparents). My partner has nothing and I don't have any issues on my side. If I have children with my partner, will any of these diseases or problems be passed on from my partners side of the family? Should I be worried? Thank You