<prompt> Barr body is absent in-Kleinefelters syndromeTurners syndromeSuper femaleNone  <response>: Ans. is b i.e., Turners syndrome Barr body Sex - chromatin o It is a densely staining inactivated condensed X chromosome that is present in each somatic cells of female. o It is found in the nucleus. o It is used as a test of genetic femaleness --- it is possible to determine the genetic sex of an individual according as to whether there is a chromatin mass present on the inner surface of the nuclear membrane of cells with resting or intermitent nuclei. Remember following fact and the question will seem very easy. o Chromatid body Barr body or sex chromatin is derived from one of the two X-chromosomes which becomes inactivated. o The numer of Barr bodies is thus one less than the number of X-chromosomes. Now see each option one by one o Kleinefelters syndrome XXY -- Two X chromosomes --- 1 Barr body 2-1. o Turner syndrome XO -3 one X chromosome -- No Barr body 1-1 0. o Superfemale X00C -3 Three X chromosome -3 2 Barr bodies 2-1. Note ? o Barr body is found in female But - Li Kleinefelter syndrome is male with Barr body. Turner syndrome is female without Barr body. 