Dispersed repetitive sequence is mainly transposable elements which are composed of transposon and retroposon.

散在重复序列主要是可转移因子，可转移因子分为转座子和返座子两种类型。

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In particular, they tracked the positions of transposable elements.

尤其是，他们跟踪了转位因子的位置。

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This paper introduced the studies advances of P transposable element in Drosophila .

本文介绍了果蝇P转座因子的一些研究进展。

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When the going gets tough for agricultural plants, for instance, the number of transposable elements seems to decline.

ECONOMIST: Truly selfish genes

But Dr Nuzhdin reckons that it may hold a clue to the proliferation of different transposable elements in other organisms.

ECONOMIST: Truly selfish genes

Dr Nuzhdin thinks that the main reason why copia does not proliferate like this in wild populations is that natural selection keeps these transposable elements in check.

ECONOMIST: Truly selfish genes