Question:

Barr body are associated with

Updated On: Jul 28, 2022
  • sex chromosome of female
  • sex chromosome of male
  • autosome of female
  • autosome of male
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The Correct Option is A

Solution and Explanation

Barr body is heterochromatic X chromosome occurring in female placental mammals. It was first found by Barr and Bertram (1949) in nerve cells of female cats & later in cells of human females by Barr in (1960). Number of Barr body is one less than the total number of X chromosomes. Basically it is absent in male but if one barr body is present in males then it lead to Klinefelter?? syndrome.
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Concepts Used:

Female Reproductive System

The female reproductive system provides various functions. The ovaries produce the egg cells known as the ova or oocytes. The oocytes are then taken to the fallopian tube where fertilization by a sperm may occur. The fertilized egg is then transferred to the uterus, where the uterine lining has thickened in regard to the normal hormones of the reproductive cycle. Once in the uterus, the fertilized egg can implant into the thickened uterine lining and continues to develop. If implantation does not take place, the uterine lining is shed as menstrual flow. In addition, the female reproductive system produces female sex hormones that preserve the reproductive cycle.

During menopause, the female reproductive system slowly stops making the female hormones that are required for the reproductive cycle work. At this stage, menstrual cycles can become irregular and finally stops. One year after menstrual cycles pause, the woman is deemed to be menopausal.