<prompt> Barr body is absent in female having46 XX genome45 X0 genome47 XXXAll of the above  <response>: Barr body is absent in those with genotype 45 XO . For a brr body to be present a minimum of 2 x chromosomes should be there . No of Barr body no of x chromosomes - 1. Reference: GHAI Essential pediatrics, 8th edition 