How many Barr bodies would be found in each of the following...?

Klinefelter syndrome 1
Extra Y 2
Extra X 2
Turner syndrome 0

I just want to make sure I'm right. I am pretty sure the first and the last are right I am just not sure about the Extra Y and the Extra X, can someone help, please?

A Barr body is the inactive X chromosome of a pair of X chromosomes. Any person with only one X chromosome won't have a Barr body. So Turner syndrome (X0) will have none, extra X (XXX) will have 2, extra Y (XYY) will have none, and Klinefelter (XXY) will have 1.

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