Category Archives: B9 Inheritance

B9 Syllabus Statements & overview

All of B9 Revision notes in downloadable word format and 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:

Play this game on the what2learn site

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:

B9.2 Cell Division

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).

Science Bank 9 (Cells & Tissues): Part 3 (from 9m 15s) also covers Mitosis & Meiosis. As does Cell Division (a 2m 3s vid from BBC iScience) & Cell Division (a 5m 23s vid from GCSE Bitesize).


IGCSE Biology: Coursebook, chapter 14, pp.195 – 197

B9.3 Monohybrid Inheritance (Genetics)

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

Here are some videos about genetic diseases: Sam’s story (cystic fibrosis) & CF short movie; sickle cell anaemia; what is Huntington’s disease?

B9.4 Variation & Selection

The Evolution of Life on Earth in 24 hours:

What is Evolution? A 9m video from Stated Clearly:

What is Natural Selection? A 9m video from Stated Clearly:

How evolution works – a gentle 12m cartoon video (from Kurz Gesagt – in a nutshell) and here is Natural Selection made easy in a 9m 48s video (from potholer54).

B9.4 Revision notes in downloadable word format.

A simulation of Natural Selection:

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).

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