A mild receding hairline. You have plenty of hair on the side. You should go get it checked out if you're worried. Some times hair falls out because of stress and diet. Its not entirely genetic.
Yes its entirely genetic. There are old men like ronald reagan that never lost any hair at 40+ years old. if it were true diet and stress could cause hair loss then he would have lost hair because I dont know any human on the planet earth that doesnt ever have any stress.