A2 Biology - Speciation (OCR A Chapter 20.6)

There are two types of speciation which illustrate how the process occurs. Allopatric speciation occurs when there is a physical barrier separating individuals in a population, causing them to be subjected to different selection pressures, driving a shift in allele frequency in their gene pools. Sympatric speciation occurs within the same habitat, where mating preferences and/or disruptive selection occurs. Please like, share and subscribe for more content and comment below to let me know what you think! :) Facebook: BioRach - A-level Biology Online   / biorachproject   Twitter: @BioRachProject https://twitter.com/BioRachProject?la... If you liked my videos and would like to support me, then I'd really appreciate you buying me a cup of tea or a piece of cake! :D https://www.buymeacoffee.com/biorachp... Background music: Sunny looks good on you by Midnight North