Most mammals, together with people, have two intercourse chromosomes, X and Y. One intercourse chromosome is often inherited from every mother or father, and so they pair up as both XX or XY in each cell of the physique. Folks with XX chromosomes usually establish as feminine, and other people with XY chromosomes usually establish as male. The genes on these chromosomes play a key position in improvement and performance – together with how coronary heart illness develops.

Earlier than I turned a biomedical engineer finding out how intercourse chromosomes have an effect on the guts, I realized about one