Ok let's start with Ross he is the eldest child in the Geller family. During the episodes we get clues that at school Ross wasn't good with girls and was a nerd. He is very proud of his intelligence, he is
esspecially good at science which leads us to his job. Ross is a paleontologist and he has a tendencey of lecturing his friends on this subject so there for is know as the smart one of the group. During the ten seasons of Friends Ross marrys three times, one of those woman was Rachel who is another member of the six friends but we'll get to that later. So there is also a joke between the group that he is always getting a divorce.
Now for Monica, Monica is Ross's younger sister. The joke is that when Monica was in school she was very fat and now she is fit and skinny and very energetic. In the programme Monica is sort of a mother figure to the rest of the friends she is extremely tidy and probably has OCD. She is also very organised.
Monica and Ross are brother and sister they didn't exactly get on when they were younger but they are now friends and have the same friendship group. The Geller parents are the parents of the six friends that are shown the most within the episodes. In fact there was one episode based around them and their wedding anniversary. We are shown in Friends that Ross and Monica's parents prefere Ross and the mother is always critisizing Monica. The Geller Family are a white american family.