Inheriting x chromosomes help please

A male, John, receives and x chromosome from his mother and a y chromosome from his father. John's mother has an x chromosome from her mother and an x chromosome from her father. So is the x chromosome John receives identical to either his maternal grandmother or his grandfather? Or is the x chromosome he receives a mix between his grandmother and grandfather. Or are both of these scenarios possible?

Another way to look at it is, did John's mother pass down to him a mixed x chromosome of her mother and father or only one of solely her mother's or father's exact x chromosome.

Here is an example...
John's maternal grandfather is colorblind and bald, two traits supposedly carried through the x chromosome. John inherited the colorblindness, but is it a certainty he also is going to inherit baldness on account of the fact he has obtained his grandfather's x chromosome? Or is the x chromosome he received possibly not solely his grandfather's, but a mix of his grandmother's as well. I've heard of the term, "crossing over," but I'm not sure if it applies here.

I hope the question isn't too confusing. Thanks for any help.

You've heard of the term 'crossing-over' from me, some hours ago when you asked a similar question...

There's a wikipedia page on it:
http://en.wikipedia.org/wiki/Chromosomal…

If you look at the red and blue diagram on the right, there's a brief summary of the M and F chromosomes mingling.
"Recombination involves the breakage and rejoining of parental chromosomes"

Edit: So yes, one trait can be inherited without the other. Inheriting one will increase the probability of inheriting the other, with the probability predictable based on how far apart the relevant genes are on the chromosome(s). If they're very close it's unlikely one would be shifted across without the other.