Here are some past essay questions:
Here are video tutorials for some assessment statements in topic 3 – more are being added all the time. Thank you to Stephanie Castle (at UNIS, New York).
Paul Andersen (from Bozeman High) shows you how to Solve Hardy-Weinberg Problems.
In Crash Course Biology #18 – Population Genetics: When Darwin met Mendel, Hank talks about population genetics including the Hardy-Weinberg equation.
The Hardy-Weinberg Principle: Watch your Ps and Qs – a video lesson with some practice questions.
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:
Here are some past essay questions:
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.
Mr. Andersen uses chromosome beads to simulate both Mitosis and Meiosis:
Independent Assortment & Segregation (click to enlarge)
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):
Find a video lesson on this sub-topic at Dan Rott videos.
The Speciation Song – a song and an animation to introduce Speciation.
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:
Mitosis (in english). And here is Mitosis in american & mitosis – a 2m 45 s vid from Bitesize Top 20 Demos. Also here is What is Mitosis? (a 3m 45s lesson) & Mitosis music video by Peter Weatherall (2m 7s).
B9.2 Revision notes in download able format.
Here is Meiosis in american (and in more detail than you need).
IGCSE Biology: Coursebook, chapter 14, pp.195 – 197
A short, simple explanation of Gregor Mendel’s work and simple gentetic crosses:
GCSE Bitesize – Inheritance, a tutorial (4m 46s):
B9.3 Revision notes in downloadable word document
BBC Short Circuit Genetics – a 19m video.
IGCSE Biology: Coursebook, chapter 14, p. 199 & pp.201 – 204
The Evolution of Life on Earth in 24 hours:
B9.4 Revision notes in downloadable word format.
A simulation of Natural Selection:
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).
This powerpoint covers Artificial Selection (selective breeding) – but we only need the first five slides:
Finally, a short (less than 5 minute) video clip from BBC iScience – Evolution of the Eye.
IGCSE Biology: Coursebook, chapter 14, pp. 204 – 210 & 213 – 214
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).
A short, simple explanation of Mendel’s work:
Mr Andersen talks you through Genetics:
And here Paul Andersen introduces A Beginner’s Guide to Punnett Squares in a 12m 15s tutorial. He also gives examples of monohybrid crosses and one example of a dihybrid cross (which we don’t need to know for SL).
An animated, narrated tutorial on Mendel’s experiments & genetic crosses from Sinauer Associates.
In Crash Course Biology #9 – Heredity, Hank and his brother John discuss heredity via the gross example of relative ear wax moistness.
Inheritance of blood types:
An animated, narrated tutorial on Gel Electrophoresis which also includes a quiz (from Sinauer Associates); and here is a video tutorial from Stephanie Castle:
For Gel Electrophoresis & DNA profiling – click on ‘Restriction Digestion & Gel Electrophoresis’ to see an Interactive Animation from Wiley or here for fantastic animated tutorials from McGraw Hill Education – DNA fingerprinting & Restriction fragment length polymorphisms (RFLPs) or how about a 5m27s lesson from Naked Science Scrapbook: how does DNA fingerprinting (DNA profiling) work?. Or, finally, Paul Andersen describes the process of DNA Fingerprinting and DNA profiling.
How to set up and run a Gel electrophoresis (for DNA profiling):
For Gene Transfers (genetic modification) see these fantastic animated tutorials from McGraw Hill Education – Restriction Endonucleases, steps in Cloning a gene & construction of a Plasmid vector or click on ‘Cloning’ to see an Interactive Animation from Wiley.
An animated, narrated tutorial on human embryonic stem cells (from Sinauer Associates).
Some excellent interactive animations & tutorials on Stem Cells, Gene Therapy or Cloning just click on Genetic Technology at the bottom of this page or for DNA extraction, Gel electrophoresis, PCR & DNA microarrays just click on Virtual Labs.