单词	heterochromatin
释义	heterochromatin noun het·​ero·​chro·​ma·​tin ˌhe-tə-rō-ˈkrō-mə-tən  : densely staining chromatin that appears as nodules in or along chromosomes and contains relatively few genes heterochromatic ˌhe-tə-rō-krə-ˈma-tik  adjective Example Sentences Recent Examples on the Web But this process inherently misses some portions of the whole genome, particularly sections of certain genes in heterochromatin regions (typically found in the centromeres and telomeres, where DNA is highly repetitive). Manasee Wagh, Popular Mechanics, 1 Apr. 2022 At the time, scientists couldn’t sequence heterochromatin, so despite the celebratory hubbub and champagne toasts, almost 10% of the genome went unsequenced. Quanta Magazine, 8 Sep. 2021 Word History Etymology German First Known Use 1932, in the meaning defined above Medical Definition heterochromatin noun het·​ero·​chro·​ma·​tin -ˈkrō-mət-ən  : densely staining chromatin that appears as nodules in or along chromosomes and contains relatively few genes
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