An extended family is a family that includes parents such as father and mother, their children, aunts, uncles, grandparents, and cousins, all of whom live in the same household. The stem and joint families are two types of forms. In a stem family, there is only one parent and many children with no siblings. In a joint family, there are both parents who live together with their children and their spouses who are related to them. Cousins are relatives who have some of their own descendants but not all. They can be first or second cousins once removed or even more remote relationships. Cousins share genes with each other to some degree, depending on how closely they are related. For example, if you have one cousin who has three children, then you would have 1/8th of the genetic material from this person. A little over half of your genetic material comes from your father and half from your mother. In addition to sharing genes, cousins also share experiences such as life lessons, happiness, and sadness. This means that when one cousin suffers through something terrible, others of that family may also experience pain and grief. But they also get support from each other because they know what it's like to go through difficult times together.