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Greg James and Bella Mackie take a lesson in genetics from Biology teacher Ms Marwick.

Greg and Bella look at the science behind DNA, find out why loving cheese is a secret super power, and discover how genetic manipulation could help humans fly, go invisible or even freeze themselves.

The discussion turns to what superpowers they would like each other to have, and would they... could they... clone Barney the Dog?

We also hear about the Dark Lady of DNA, Rosalind Franklin, and discover how she set the groundwork for Watson and Crick's discovery of the double helix, which picked up a Nobel Prize in 1962.

Bad students of all ages are welcome. Expect brilliant teachers, captivating subjects but absolutely no homework.

Get in touch with your funny school stories - email us at teachme@bbc.co.uk