Word: ibex
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Dates: during 2010-2019
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Back-breeding has an advantage over cloning in that it creates a whole population, rather than just an individual animal. Last year, Spanish scientists used cloning to successfully recreate an ibex that disappeared in 2000, and in Poland another group is trying to clone the aurochs using DNA from bone and teeth samples. But for a species to survive once it's brought back to life, it must have enough genetic variability to reproduce. "A population needs to be adaptive," says Johan van Arendonk, a professor of animal-breeding and genetics at Wageningen University in the Netherlands, adding that...