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A Barr body is the inactivated X chromosome that is usually found in the nuclei of female somatic cells. It can also occur in males when there is an abnormality and the male is XXY instead of the normal XY, a condition known as Klinefelter's syndrome.
A Barr body represents an inactive X chromosome in a femaleâs somatic cell. Barr bodies are small, dark stained mass of inactive X-chromosomes in females within the nucleus. Mc.Barrâ and âBertram were the two scientists to observe the deeply stained chromatin body in the nerve cell of female cat in the year 1943.