The team targeted the animals in their natural habitat to analyse individual variation and consistency in behavioural response.

BBC: Seal pup

All of the published data shows that there is a great deal of individual variation between cloned animals.

FORBES: Magazine Article

However, even with this individual variation, the epidemic has predictable patterns in subpopulations.

FORBES: The Lancet's Series on Obesity

For most individuals, the ventilatory threshold is around 50% to 60% of the way to their maximum capacity, though there is tremendous individual variation.

WSJ: Hard-Wired to Hate Exercise?

Previous research had shown, for instance, that 29% of the variation in whether or not people invest in stocks depends on their DNA. Studies of professional traders had demonstrated that approximately 25% of individual variation in portfolio risk is due to genetics.

WSJ: Jonah Lehrer on Genetics, Dopamine and Wall Street | Head Case

This, the theory goes, would bolster variety in an individual's offspring above and beyond the variation already provided by sexual reproduction.

ECONOMIST: Brain development may be influenced by genetic parasites