327 reactions · 85 shares | Teachers, looking for online elementary science resources due to school closures? Try GenerationGenius.com for fun & engaging science videos, reading material, quizzes and more. Students and teachers can easily access from anywhere. During this challenging time, we have expanded the number of lessons available to try for free. | Generation Genius | Facebook

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