Sentence:  The <WSD>RIP</WSD> process can be extremely efficient. A linked duplication of 6 kb of Neurospora DNA, whose elements were separated by 7.5 kb of bacterial and unique Neurospora sequences, never survived a cross unrearranged. 
Meaning of the word marked with <WSD> tags:  Repeat-induced point mutation, a process by which both copies of duplicated sequences are mutated.