So while any baby born through this method would have genetic elements from three people, the nuclear DNA that influences appearance and other characteristics would not come from the woman providing the donor egg.

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But some groups have expressed concern that this method involves making a genetic change to an egg that can be passed down through generations.

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It can be caused by a number of factors, including a rapid increase in the frequency of training, sudden increase in the intensity of training, transition from one training method to another, genetic abnormalities of the knee joint and poor base strength of the quadriceps.

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The researchers said this is a way of getting more specific genetic material into an egg than the method used on Dolly.

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Although the tried-and-true method of hybridisation is just another type of genetic modification, the public seem to think that it is normal.

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One common method was to cover small gold particles with genetic material and shoot them into the nucleus of the plant cell with a pressure gun.

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And the group used a problematic method for searching for particular organisms in the mess of genetic material they sequenced.

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Microarrays also obtain genetic information from microbes in soil or water, and while less quantitative than qPCR, this method can analyze tens of thousands of genes at once.

FORBES: Guest post written by Aaron Peacock