A Level Biology: Lesson 359.


Task 1. Check Where this Lesson fits into your Exam Specification!

Task 2. Watch the Revision Notes Lesson in Full.


00:00 Intro Screen

00:15 Learning Outcomes

00:22 What is Gel Electrophoresis?

01:00 How does Gel Electrophoresis work?

02:50 Small DNA fragments migrate further an quicker...

03:15 Remember DNA is mixed with a loading dye...

03:49 Watch VNTRs (Genetic fingerprinting next)

04:14 Exam style Q and A (1).

04:40 Exam style Q and A (2).


Check Your Spec!

★ AQA Specification Reference: - Genetic fingerprinting (A-level only). Students should be able to: interpret data showing the results of gel electrophoresis to separate DNA fragments.


★ CIE Specification Reference: - 19.1 Principles of genetic Technology: d) describe and explain how gel electrophoresis is used to analyse proteins and nucleic acids, and to distinguish between the alleles of a gene (limited to the separation of polypeptides and the separation of DNA fragments cut with restriction endonucleases)


★ Edexcel (Biology A – Salters-Nuffield) Specification Reference: - Topic 6: Immunity, Infection and Forensics. Use gel electrophoresis to separate DNA fragments of different length.


★ Edexcel (Biology B) Specification Reference: - N/A. Note; Electrophoresis is NOT specifically mentioned in the spec. but understanding it is essential for Topic 7: Modern Genetics. 7.1 Using gene sequencing - in particular in forensic science, to identify criminals and to test paternity, using DNA profiling.


★ OCR (Biology A) Specification Reference: - 6.1.3 Manipulating genomes (e) the principles and uses of electrophoresis for separating nucleic acid fragments or proteins


★ OCR (Biology B) Specification Reference: - 5.1.3 Gene technologies (d) the principles and uses of agarose gel electrophoresis.


★ WJEC Specification Reference: - 7. Application of reproduction and genetics: (d) the use of PCR and electrophoresis to produce a genetic fingerprint; the forensic use of genetic fingerprinting.


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