Category Archives: 10. Genetics & Evolution

10.1 Meiosis

10.1 meiosis from Bob Smullen

Here are some fantastic animated tutorials about Meiosis from McGraw Hill Education – how Meiosis works, the stages of Meiosis, Meiosis I, Meiosis II, Crossing-over, Independent Assortment & unique features of Meiosis.

From Sinauer Associates comes an animated, narrated tutorial on Independent Assortment which also includes a quiz; there’s also one on Independent Assortment & gamete diversity (with a quiz) and one on mistakes in meiosis – nondisjunction.

Mr. Andersen uses chromosome beads to simulate both Mitosis and Meiosis:





Independent Assortment & Segregation (click to enlarge)

10.2 Inheritance

10.2 inheritance from Bob Smullen

Crossing over & Linked Genes: (a 7 minute lesson):

Paul Andersen explains how Linked Genes behave using fruit flies in a 17m 22s tutorial.


The science of skin color – Angela Koine Flynn, a 5m vid from TED-Ed.

Breaking the illusion of skin color, a 15m TED-Ed video from Nina Jablonski

10.3 Gene Pools & Speciation

10.3 gene pools and speciation from Bob Smullen

Speciation: an illustrated introduction in 8 minutes or how about the Speciation Song – a song and an animation to introduce Speciation?

 IB 10.3 – Gene Pools and Speciation, a 14m 40s video lesson from Dan Rott videos.

Crash Course Biology #15 – Speciation: Of Ligers & Men, in which Hank explains speciation in terms of finches, ligers, mules and dogs.

Paul Andersen (from Bozeman High) explains Reproductive Isolation and Speciation, then details the processes of Speciation & Extinction and finally describes Genetic Drift (this is more detail than is required for IB).

Here’s a presentation that explains the origin of species (speciation) very clearly: