You can find all my A Level Biology videos fully indexed at [ Ссылка ]

In this video, we look at stabilising selection and directional selection. First we explore stabilising selection, using the example of birth weight in humans. We then look at directional selection, including the presence of antibiotic resistance.

Image credits:

Basketball
[ Ссылка ]
Christopher Johnson, CC BY-SA 2.0 [ Ссылка ], via Wikimedia Commons

Bird
[ Ссылка ]
MichaelMaggs – Edited (sharpened, down-sampled, contrast corrected, noise removed) by: Arad, CC BY-SA 2.5 [ Ссылка ], via Wikimedia Commons

Staph A
[ Ссылка ]
Content Providers(s): CDC/ Matthew J. Arduino, DRPH Photo Credit: Janice Haney Carr, Public domain, via Wikimedia Commons

свернуть