Bottlenecks and Founder Effects. Genetic drift can cause big losses of genetic variation for small populations. Population bottlenecks occur when a populations size is reduced for at least one generation.ottlenecks and Founder Effects. Genetic drift can cause big losses of genetic variation for small populations. Population bottlenecks occur when a populations size is reduced for at least one generation.
Chernobyl, or Chornobyl, is the name of a city situated in northern Ukraine near the border with Belarus. Chernobyl was largely abandoned following the disaster at the Chernobyl Nuclear Power Plant located 14.5 kilometres (9 miles) away.
Today, the Chernobyl Nuclear Power Plant sits inside a fenced area known as the Exclusion Zone. Radioactive remnants of the failed reactor linger inside the so-called sarcophagus, a 24-story concrete and steel encasement hastily erected after the accident.