染色質(zhì)DNA在細(xì)胞分裂之前必須復(fù)制.The DNA of chromatin must replicate before cell division.異染色質(zhì)大部分是由短而重復(fù)的多核苷酸序列所組成的.Heterochromatin has shown to be composed largely of short repeated polynucleotide sequences.那些表現(xiàn) “ 正常的 ” 濃縮格式的部分叫做常染色質(zhì).T...