Tag Archives: genes
4.2.3 Plant tissues, organs and systems
Evolution (variation & selection)
VARIATION
It’s coming!
ADAPTIVE FEATURES
A lesson in Plant Adaptations from Ms Cooper (12m 15s); Specialized Leaves, a short 1m 39s video.
NATURAL 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).
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:
Igcse biology edexcel 5.10 5.20 from Marcos Rodriguez
A lesson on Selective Breeding from Mr Dare:
IGCSE Bio Topic 17 – Inheritance
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.
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:
Topic 10 Genetics & Evolution
Here are some past essay questions:
3.2 Chromosomes
IB Biology 3.2 chromosomes from Bob Smullen
How DNA supercoiling is achieved to make chromosomes (1m 31s):
We need to know how sex is determined in humans – what about other animals?: Sex Determination: More Complicated Than You Thought, a 6m TED-Ed lesson. Here is another TED-Ed lesson: Secrets of the X chromosome in 5m.
17.2 Chromosomes, Genes and Proteins
Hip, hip hooray for DNA! – the DNA song by Peter Weatherall (2m 47s).
Where do genes come from? A TED-Ed video (not on the syllabus):
17.1 & 17.2 revision notes in downloadable word format; to complete.
17.5 Monohybrid Inheritance (Genetics)
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.
Here are some videos about genetic diseases: Sam’s story (cystic fibrosis) & CF short movie; sickle cell anaemia; what is Huntington’s disease?
IGCSE Bio Topic 18 – Variation & Selection
Topic 18 revision notes in downloadable word format; to be completed.
VARIATION
It’s coming!
ADAPTIVE FEATURES
A lesson in Plant Adaptations from Ms Cooper (12m 15s); Specialized Leaves, a short 1m 39s video.
NATURAL 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).
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:
Igcse biology edexcel 5.10 5.20 from Marcos Rodriguez
A lesson on Selective Breeding from Mr Dare:
3.4 Inheritance
IB Biology 3.4 inheritance from Bob Smullen
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).
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:
Radiation & Mutation
Chernobyl: what happened thirty years ago? – one of the engineers tells his story in 2m 50s. The health dangers of radiation in 4m 32s.
Sickle Cell Anaemia
A 4m 40s video from TEDEd: How this disease changes the shape of your cells