The wolves are exposed to cancer-causing radiation as they roam the wastelands of the abandoned city - with researchers finding part of their genetic information seems resilient to increased risk of the disease.
If you have an extremely high infant mortality rate, it won’t take that long.
If the radiation kills off a high enough percentage of individuals without cancer resistance it won’t take long at all.
Theoretically you could do it in only 2-3 generations if you had environmental factors that could give 100% of individuals without resistance cancer.
And that trait does exist in nature already, it’s just rare and mostly useless until environmental pressures only allow those individuals to reproduce.
If you have an extremely high infant mortality rate, it won’t take that long. If the radiation kills off a high enough percentage of individuals without cancer resistance it won’t take long at all.
Theoretically you could do it in only 2-3 generations if you had environmental factors that could give 100% of individuals without resistance cancer.
Only if you have some individuals with [cancer or whatever] resistance though.
And that trait does exist in nature already, it’s just rare and mostly useless until environmental pressures only allow those individuals to reproduce.