Tag Archives: chromosomes
4.2.3 Plant tissues, organs and systems
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:
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?
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
3.5 Genetic Modification & Biotechnology
IB Biology 3.5 genetic modifcation and biotechnology from Bob Smullen
An animated, narrated tutorial on Gel Electrophoresis 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.