Discussion
Sex can be established by examining hair root cells for the presence of :
Answer: A
Sex is shown by the presence of the Barr body.
In females one X chromosome in each cell is inactivated and condensed into sex chromatin, a dark body against the nuclear membrane named after Murray Barr. Cells from a hair root sheath, stained and examined under the microscope, show Barr bodies in a proportion of female cells and not in male cells.
The Davidson body, or drumstick, is the sex chromatin seen in neutrophil leucocytes of blood, not in hair root cells. The Golgi body is an organelle present in both sexes, and the medullary index is a ratio of hair widths used to tell human from animal hair.
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