Natural Selection vs Artificial Selection | Mechanisms of Evolution

Natural and Artificial Selection are fairly straightforward, and in this video, I give you everything you need to know. Full transcript below. Let me know what videos you want to see. Study guides I recommend: My Gear Thanks for stopping by, today we are going to talk about evolutionary selection, specifically Natural Selection and Artificial Selection. But before we get into that, let’s define selection. Selection is the process by which inherited traits are selected for or against and thus become more or less abundant in the population. Now let’s apply this definition to natural selection. For natural selection to occur in a population three criteria must be met. 1 – There must be variation in the population. -For example, brown beetles vs green beetles of the same species. 2 – The trait must be heritable. Which is to say, it can be passed on from one generation to the next. 3 – More offspring are produced then the environment can support. -In other words, a portion of all the offspring will die because there aren’t enough resources to support them. So in natural selection nature selects which ones will die based of how their traits “fit” with that environment. Going back to our beetle example, if there is a drought one year and all of the green vegetation dies leaving only brown earth behind, the brown beetle will thrive while the green population dwindles. Nature selected for the brown beetle through a natural occurrence which favored the brown...