It's a conservative strategy -change from one generation to another will likely be moderated/averaged by the influence of the second X chromosome for female offspring. Alternatively, single copy governed traits (as in males) mean greater ability to adapt (at a higher mortality rate) and those successful remaining males can propagate their single X chromosome (new and improved, thank you) to their daughters. It's a cool pattern of balances, IMHO.
Hmm. Are you saying that men's imputing of adaptations to their one X chromosome is somehow more concentrated/effectual than the adaptations a woman imputes to her 2 X chromosomes? What is the mechanism and how did you draw that conclusion? Because she only passes one along?
It seems to me that chiefly the non-suppressed X chromosome in females would see action by its workings and thus accumulate adaptations.
Females have both X chromosomes active, but only one copy per cell due to Barr body deactivation. Some female cells have one copy active, others utilize the other copy.
This scheme can lessen certain X-linked genetic disorders in women since not all cells will be affected.
