A2 Biology - DNA profiling (OCR A Chapter 21.1)

DNA profiling is a technique where we can use to identify an individual based on their unique DNA. People all have different number of repeats in their satellite DNA, so therefore can generate a different DNA profile. It is commonly used in forensics and paternity testing, where we compare several individuals' DNA profile to identify the person we are looking for. In this video I will explain the principles behind DNA profiling and the detailed process of it.

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[anamikakumar]

watching this a day before paper 2 !! thank you for your videos, best biology videos i've watched to help me understand the content

[joemewis]

I’m so glad you’re still reading all these comments years later. Thank you for helping a generation of biologists !

[pepsiknight]

Nothing like speeding through these videos on 2x speed 2 hours before your Paper 3 exam - thanks for the quality content! Here's to hoping the paper won't be as bad as Paper 2

[dashiuscy]

Absolute stellar explanation you have a talent for teaching

[anonymous-krpj]

wow your amazing
that one video taught me more than what i learnt in 3 weeks with my teacher! so if possible please continue to make videos especially on ecosystem
thank you for making such good videos especially before our exam which is in 2 days :)

[cherishhewitt]

This was really useful - I finally get the separation step of DNA profiling!! Thank you!!!

[혜바라기-qj]

Thank you so much for this video. Keep up the good work! you're saving students from all around the world!

[ghsjgsjgchjdkhjydhdkhfmh]

Wow thank you!! This whole chapter was so confusing for me before

[lylybel]

Thank you very much for these videos. They are always clear and well explained. I use your videos to plan my OCR a level biology lessons. My students also use your videos to revise. I wish you all the best. Well done

[yd]

Hi, 6:00 on a markscheme it says that you should cut the DNA into varying lengths before you amplify it.

[preciouslamajuka]

Thank you so much! Great explanation !!

[KungFuBarbie-pchb]

I know this is too late but i wish you would reduce the cuts in the video, it gets kind of confusing when suddenly there's a cut in voice and your hand teleports and there's new information on the screen. Otherwise thank you very much, very helpful video

[ranaizan]

I watched many but got now when saw this video really really helpful

[tqkhjxy]

Can you make videos on immunology and diseases please 💘💘 you’re amazing I’m so happy I found you before it was too late

[alannoori]

thank you for explanation
i wanna to know about microsatellite

[fional]

Thank you so much for the viedo！So helpful!！！

[lucydiston]

Hi i was just wondering where DNA chips, DNA probes, gene therapy and vectors for gene therapy tie in, thank you so much!

[fatmadalokay]

the video is veryy helpful to understand the whole topic thank youu!!

[oliviawing]

Are the differences each persons DNA profile down to restriction endonucleases cutting at different restriction sites or the different satellite regions?

[yd]

At 8:00 do you say 'Nylon sheet' if so then I can't find this in the textbook

P.s. very good video