Also the written representation of Metafemale Syndrome, where an extra X chromosome is inherited from one of the parents. XXXX is also a possiblility, and is called poly-x. In both cases the woman is almost completely phenotypically normal, but is disposed to be taller and slimmer than average. Comparable to the effects of XYY syndrome in men. Only one X is active for each cell (though which may vary in different body parts), the other one, two, or three are inactive and are refered to as barr bodies.