<<返回上一页

Still jumping

发布时间:2019-03-08 07:08:15来源:未知点击:

BITS of DNA that love to roam may play a major role in shaping new species. Some pieces of DNA can copy themselves and leap into new locations on chromosomes, but in mammals, it was thought that most “jumping genes” are so ancient and mutated that they are no longer mobile. Now Haig Kazazian and his colleagues at the University of Pennsylvania in Philadelphia say the house mouse has 3000 active mobile elements. By comparing mouse species, they found the number of “retrotransposons” has multiplied even within the past century (Nature Genetics, vol 20, p 288). “They are still going like gangbusters,