How do you tell a male chromosome from a female chromosome?

Question

You look in their geans.

Answer 1

Is that a joke or do you genuinely want to know the difference?

Answer 2

Funny.....but it's g-e-n-e-s.

Answer 3

There can be nothing like a male chromosome or a female.

But cells  of a male &female can be distinguished  in that cells of a  female  have BARR body attached to inner surface of nuclear memrane

& by absence of Y chromosome or presence of 2 X  chromosomes