[ZeoRangerV]

Quote:

Originally Posted by GoseiWonder

Why aren't Daleks going extinct yet or at least at incredibly high risk of that?

Considering how they started off looking like human aliens and are now hideous squirming monstrosities due to their xenophobic racist self-applied eugenics making them incapable of doing anything outside of their little tank suits, how long will it take before they start biologically breaking down, with high rates of debilitating birth defects, stillborn young, infertility and spontaneous organ failure leading to death?

I assume you're being incredibly facetious but if you really want an answer.

The mutations weren't self-applied, they were the actions of an insane scientist who believed that them becoming that was the only way they could survive and win a catastrophic nuclear war that had ravaged their planet for years. He took everything away that made them human, genetically engineered them with the belief that they were superior and the end product was the Dalek. Then they turned their back on him because they were so fundamentally different.

As for the rest of your question, why are you applying human genetical logic to a alien race? They don't breed, they're genetically engineered to ensure that the race remains pure. Then (according to the most recent series) when their bodies start breaking down they go on surviving, incapable of being anything more than a conscious pile of sludge that can't do anything but hate.

Quote:

Originally Posted by Thessair

Presumably, given their temperament, any clones that don't meet their standards are destroyed (or dumped in the -ugh, stupid Moffat- living sewer) and more grown in their place.

Yeah, they have to be quite literally perfect. They've had civil wars over minor differences.