I understand allele dominance clearer now, it makes more sense this way, Thanks a lot

Thank you a lot once again, you explained it clearly for me and i hope i understood it right, but i have a question still if you can, shouldn't allele dominance solve the issue? As in, we have an allele of each gene encoded in each X chromosome, if each gene has a dominant allele that is expressed and a regressive one which is not, wouldn't that mean that the total expressed wouldn't surpass the genes of one X chromosome? Or is co-dominance going to create enough duplicates for it to be troublesome, i know allele dominance is way more complex than that but I'm wondering where I'm being wrong.

Thank you a lot for responding, however i want to know, what dose are you talking about when you say "dosage"?