单词	extrachromosomal element
释义	extrachromosomal element /ˌɛkstrəˌkrəʊməˈsəʊm(ə)l ˌɛləm(ə)nt / noun Genetics The DNA of a cytoplasmic organelle, such as a mitochondrion or chloroplast, responsible for cytoplasmic inheritance.If, on the other hand, excision occurs by 1-bp staggered cuts, we expect that only the first nucleotide flanking the extrachromosomal element will correspond to the donor site.... The difficulty of removing the amplified gene by repeated backcrossings may suggest the presence of an extrachromosomal element, as often observed in other protozoa. The transgene array in PD3815 is inherited as an extrachromosomal element.
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