No. The tiny little gonads will be either gray or orange. The gonads may still be a mixture, but each individual cell will be one or the other. So the gamete produced by that cell will have the same DNA of just that cell even though the organ is a mixture.
Do you get X inactivation with such clean divisions? I thought it was a stochastic process much later in development? This isn't my area so I'm relying on something like high school biology on this one.
I actually don't know, it's a good point. It's definitely stochastic, but I don't know how late in the development it happens. There are definitely cats with colours completely jumbled cats with large patches of each colour. But I just realised that colour comes from melanocytes. And melanocytes must migrate from the back, as they come from neural crest. Which strikes me as a great reason for straight division on the front (the cells coming from left and right meet there) that we see here, regardless of the origin of diversity of cell colours. So I think it shouldn't matter, but it's just a guess.