<unk>  is a technique for genetic sex determination in those species where XX chromosome pair is present.<unk>  can be done by identifying Barr body, a drumstick like appendage located in the rim of the nucleus in somatic cells. Barr body is the inactive X chromosome which lies condensed in the nucleus of somatic cells. A typical human (or other XY-based organism) female has only one Barr body per somatic cell, while a typical human male has none. Though a Barr body can be sought in any human<unk> ed cell, circulating mononuclear cells are commonly used for this purpose. These cells are cultured, and treated with chemicals such as colcemid to arrest mitosis in metaphase. A minimum of 30 percent of sex chromatin indicates genetic female sex.
Nuclear sexing
Structural inheritance
Fetal programming
Sex-chromosome dosage compensation
Sex selection
Genetics of obesity
Genomic imprinting
Germline mosaicism