Classification, a 19m video from Scientific Eye:
Variation, Classification & Inheritance, a 15m revision video from BBC Bitesize KS3:
Here are key terms and some definitions: Key Terms B9
GCSE Bitesize more-or-less covers all of Variation, Inheritance & Evolution in 15m.
For self-assessment questions, with exercises and discussions, just click on the correct topic at Biology GCSE & IGCSE Question Bank. A powerpoint can be downloaded from the same site here. The s-cool revision site lets you revise the topic, summarizes the topic & tests you on it. GCSE Bitesize has revision pages (that take you through the topic), a test and an activity.
Here’s Penguins in peril: Inheritance – know your genetic jargon & ratios:
This is a great power-point that covers most of this topic, although we don’t need to know about co-dominance or pedigree charts:
Many assessment statements are covered in videos by Stephanie Castle (with more being added all the time).
Some excellent interactive animations & tutorials on DNA & Genetics – just click on ‘Tour the Basics’ & ‘Heredity & Traits’.
Where do genes come from? A TED-Ed video (not on the syllabus):
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:
A short, simple explanation of Gregor Mendel’s work and simple gentetic crosses:
17.5 Inheritance notes in downloadable word format; to be completed.
GCSE Bitesize – Inheritance, a tutorial (4m 46s):
BBC Short Circuit Genetics – a 19m video.
Topic 18 revision notes in downloadable word format; to be completed.
The Evolution of Life on Earth in 24 hours:
A simulation of Natural Selection:
|Click to Run|
Here’s Darwin’s Song from Horrible Histories and in What is Evolution? Biology teacher Ceri Evans gives a master class to students on what he says is arguably the greatest idea anybody ever had: evolution (28 mins). 2 more videos – James May’s things you need to know – Evolution (29m) & BBC Short Circuit Theory of Evolution (19m).
Finally, just for interest, a short (less than 5 minute) video clip from BBC iScience – Evolution of the Eye.
SELECTIVE BREEDING (ARTIFICAIL SELECTION)
This powerpoint covers Artificial Selection (selective breeding) – but we only need the first five slides:
A lesson on Selective Breeding from Mr Dare:
Mr. Andersen uses chromosome beads to simulate both Mitosis & Meiosis (11m 53s):
A short, simple animation to show meiosis and two animated, narrated tutorials – one from McGraw Hill Education – Mitosis & Meiosis compared – and one from Sinauer Associates – Meiosis that also includes a quiz.
In Crash Course Biology #13 – Meiosis: Where the Sex Starts, Hank gets down to the nitty gritty about meiosis.
Scientific Eye – Reproduction & Genetics (a 19m video) and here is a 15m 25s video covering Variation, Selective Breeding & Classification from KS3 Bitesize:
What is Selective Breeding? – a 2m 30s video:
Super Cow Creators – these gigantic cows resemble bovine body-builders. See how breeders have achieved such amazing results (4m 44s).