DNA – Inheritance and genetics – KS3 Biology – BBC Bitesize
Dr Andrew Hart: My name is Dr Andrew Hart and I’m a senior forensic scientist.
DNA stands for deoxyribonucleic acid, it’s a complex chemical. It’s found in the nucleus of cells.
DNA is fundamental to our job. And what it is, it codes for your sort of genetic makeup, such as things like your eye colour and your hair colour, sort of your physical and chemical characteristics. Everyone’s DNA is almost unique apart from that of identical twins.
With the police, we’re using forensic science to help with their criminal investigations, using things like bloodstain pattern analysis, we’re looking at body fluids.
DNA can transfer in many different ways, my saliva could be deposited on a surface or I might have cut myself and left my blood or a hair might have fallen out.
DNA can survive thousands of years, so we can go back to old crime scenes.
If you’re thinking of applying for this job, is to get a good grounding in science, chemistry, physics, biology. The job I do as a forensic scientist, you know, it’s different every day, and that one particular case, it could be that, you know, the breakthrough that the police need. That gives you such a buzz and a rush and you just feel that, you know, you’ve really made a difference.