There are several genes involved in determining your hair texture, curvature and thickness [9]. Both your parents pass on some genetic information and the way those puzzle pieces combine determines the final result. So the genes from your mother and father may have combined in a way that gives you a different hair type from theirs. Moreover, there are also recessive genes that may occasionally be passed down from grandparents or other biological relatives. So your hair may be more similar to your grandma’s or grandpa’s than to your parents’.