<prompt> Barr body is found in which phase of cell cycle?InterphaseMetaphaseG1 phaseTelophase  <response>: Barr body, or X chromatin The inactive X appears in the interphase nucleus as a darkly staining small mass adjacent to the nuclear membrane Molecular basis of X inactivation involves a unique gene called XIST, XIST codes for long noncoding RNA that is retained in the nucleus, where it coats the X chromosome that it is transcribed from and initiates a gene-silencing process by modification of chromatin and DNA methylation. 