Uploaded August 2023 | Updated September 2026, 8 hours ago
You can find all my A Level Biology videos fully indexed at freesciencelessons.co.uk/a-level-revision-videos/a-level-biology
In this video, we look at the factors affecting genetic biodiversity. This includes factors that increase genetic biodiversity such as mutations and gene flow, as well as factors that reduce genetic biodiversity such as the bottleneck effect, the founder effect and genetic drift.
Image credits:
Alpacas
commons.wikimedia.org/wiki/File:Alpacas.JPG
Philippe Lavoie, Public domain, via Wikimedia Commons
Herd of cows
commons.wikimedia.org/wiki/File:Herd_of_cows_on_the_sea_bank_-_geograph.org.uk_-_3665300.jpg
Herd of cows on the sea bank by Mat Fascione, CC BY-SA 2.0 creativecommons.org/licenses/by-sa/2.0, via Wikimedia Commons
Wheat field
commons.wikimedia.org/wiki/File:Vehn%C3%A4pelto_6.jpg
kallerna, CC BY-SA 4.0 creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons
Charles Darwin
commons.wikimedia.org/wiki/File:Charles_Darwin_seated_crop.jpg
Charles_Darwin_seated.jpg: Henry Maull (1829–1914) and John Fox (1832–1907) (Maull & Fox) [3]derivative work: Beao, Public domain, via Wikimedia Commons
Sumatran tiger
commons.wikimedia.org/wiki/File:Sumatran_Tiger_Berlin_Tierpark.jpg
Captain Herbert, CC BY-SA 3.0 creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons
Manx loaghtan
commons.wikimedia.org/wiki/File:Manx_loaghtan.jpg
Chris Bramhall at English Wikipedia, Public domain, via Wikimedia Commons
Stem Cutting
commons.wikimedia.org/wiki/File:Stem_Cutting.jpg
Kumar83, CC BY-SA 3.0 creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons
Black robin
commons.wikimedia.org/wiki/File:Black_Robin_on_Rangatira_Island.jpg
frances schmechel, CC BY-SA 2.0 creativecommons.org/licenses/by-sa/2.0, via Wikimedia Commons
Wolf
commons.wikimedia.org/wiki/File:Front_view_of_a_resting_Canis_lupus_ssp.jpg
Gary Kramer, Public domain, via Wikimedia Commons
Isle Royale
commons.wikimedia.org/wiki/File:Isle_Royale_-_Beach_Near_Mouth_of_Washington_Creek.JPG
Jhodkiewicz at the English Wikipedia, CC BY-SA 3.0 creativecommons.org/licenses/by-sa/3.0/, via Wikimedia Commons
Moose
commons.wikimedia.org/wiki/File:Alces_alces.jpg
bcameron54, CC BY-SA 3.0 creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons
You can find all my A Level Biology videos fully indexed at freesciencelessons.co.uk/a-level-revision-videos/a-level-biology
In this video, we look at the factors affecting genetic biodiversity. This includes factors that increase genetic biodiversity such as mutations and gene flow, as well as factors that reduce genetic biodiversity such as the bottleneck effect, the founder effect and genetic drift.
Image credits:
Alpacas
commons.wikimedia.org/wiki/File:Alpacas.JPG
Philippe Lavoie, Public domain, via Wikimedia Commons
Herd of cows
commons.wikimedia.org/wiki/File:Herd_of_cows_on_the_sea_bank_-_geograph.org.uk_-_3665300.jpg
Herd of cows on the sea bank by Mat Fascione, CC BY-SA 2.0 creativecommons.org/licenses/by-sa/2.0, via Wikimedia Commons
Wheat field
commons.wikimedia.org/wiki/File:Vehn%C3%A4pelto_6.jpg
kallerna, CC BY-SA 4.0 creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons
Charles Darwin
commons.wikimedia.org/wiki/File:Charles_Darwin_seated_crop.jpg
Charles_Darwin_seated.jpg: Henry Maull (1829–1914) and John Fox (1832–1907) (Maull & Fox) [3]derivative work: Beao, Public domain, via Wikimedia Commons
Sumatran tiger
commons.wikimedia.org/wiki/File:Sumatran_Tiger_Berlin_Tierpark.jpg
Captain Herbert, CC BY-SA 3.0 creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons
Manx loaghtan
commons.wikimedia.org/wiki/File:Manx_loaghtan.jpg
Chris Bramhall at English Wikipedia, Public domain, via Wikimedia Commons
Stem Cutting
commons.wikimedia.org/wiki/File:Stem_Cutting.jpg
Kumar83, CC BY-SA 3.0 creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons
Black robin
commons.wikimedia.org/wiki/File:Black_Robin_on_Rangatira_Island.jpg
frances schmechel, CC BY-SA 2.0 creativecommons.org/licenses/by-sa/2.0, via Wikimedia Commons
Wolf
commons.wikimedia.org/wiki/File:Front_view_of_a_resting_Canis_lupus_ssp.jpg
Gary Kramer, Public domain, via Wikimedia Commons
Isle Royale
commons.wikimedia.org/wiki/File:Isle_Royale_-_Beach_Near_Mouth_of_Washington_Creek.JPG
Jhodkiewicz at the English Wikipedia, CC BY-SA 3.0 creativecommons.org/licenses/by-sa/3.0/, via Wikimedia Commons
Moose
commons.wikimedia.org/wiki/File:Alces_alces.jpg
bcameron54, CC BY-SA 3.0 creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons
