19 reactions | Genetic drift happens when chance events cause alleles to spike or decline from one generation to the next. Sometimes a segment of a population gets isolated and continues to grow and mutate on it's own. Sometimes populations change as a result of natural disasters or human intervention. https://youtu.be/mFvmY9JASO4 | CrashCourse | Facebook

14 reactions | Inside the cells of every living thing are molecules of DNA. Hidden within DNA's structure is a universal language: the genetic code. 溺 Learn more about genetics with today's Featured Movie. https://brnpop.co/3bSGYau | BrainPOP | Facebook