SORU: aşağıdaki parçaya göre cevaplayınız
According to the passage, the lack of subsequent chromosomal damage in mice brought into the Chernobyl Exclusion Zone from radiation-free areas proves that ----.
During our visit in the summer of 1994 to the
Chernobyl Exclusion Zone, a region within a 30 km
radius of the Chernobyl Nuclear Power Plant, we
were amazed by the diversity of mammals living in
the shadow of the ruined reactor only eight years
after the meltdown. During our excursion through the
woods, we trapped some of the local mice for
examination in a makeshift laboratory. We were
surprised to find that, although each mouse
registered unprecedented levels of radiation in its
bones and muscles, all the animals seemed
physically normal, and many of the females were
carrying normal-looking embryos. We found that the
mice did not have any obvious chromosomal
damage. We wondered whether the absence of
injury could be explained by some sort of adaptive
change, perhaps a more efficient DNA-repair
mechanism, after many prior generations had been
exposed to radiation. But when we transplanted wild
mice from uncontaminated regions into cages in the
Exclusion Zone and then examined their
chromosomes, they were likewise unaffected by the
radiation. In at least this respect, the mice seemed to
have a natural “immunity” to harm from radiation.