Question

Will there be a Barr body in male with Klinefelter's syndrome ?​

Answer 1

Answer:

During embryonic development, female inactivates one of the X chromosomes because if both the X chromosomes are genetically expressed simultaneously, then double the necessary genetic products will be made. This inactivated X chromosome is called a Barr body. Men with Klinefelter syndrome (47, XXY ) have a single Barr body but it is not seen because that extra copy of X  chromosome is inactivated.