No. Impossible. His "Wife/Daughters" were made in his likeness and was not an easy task. I assume it was painstaking enough that he would never attempt it again. In the case of the Dwemer, it is highly unlikely that this is a power within his grasp. Even attempting this would end in failure.
Not impossible. Theory. ;P
Nothing in Morrowind says anything about Dwemer cloning for or against, so you can't say that Divayath would or wouldn't clone Yagrum. Besides, if it was so painstaking, why would he do it
four times? You'd think he'd stop at once.
That said, proweler, you make some very good points. However, i've said this many times before, they might have different beliefs and customs, but they're still technically Dwemer.
Ashlander and Great House Dunmer have completely different societies, but they're still the same race. Altmer and Chimer were probably the same, too, at least initially. It's no doubt the environment of Vvanderfell contributed heavily to their development into their own distinct race.
Any differences between the Dwemer and the Yagrummer (love that name, btw) would arise after the Yagrummer develop their own, distinct styles of doing magic, not to mention their own ways of handling their environment. For the first few generations, they'd have no reason to be different to the Dwemer.
Just to reiterate, there is no reason to assume that "culture" should be synonymous with "race".