facultative heterochromatin

heterochromatin

[het″er-o-kro´mah-tin] that state of chromatin in which it is dark-staining, genetically inactive, and tightly coiled.constitutive heterochromatin the chromatin in regions of the chromosomes that are invariably heterochromatic; it contains highly repetitive sequences of DNA that are genetically inactive and serves as a structural element of the chromosome.facultative heterochromatin the chromatin in regions of the chromosomes that become heterochromatic in certain cells and tissues; for example, it makes up the inactive X chromosome in female somatic cells.

fac·ul·ta·tive het·er·o·chro·ma·tin

nonrepetitive heterochromatin that comprises translatable sequences of DNA.

单词	facultative heterochromatin
释义	DictionarySeeheterochromatin facultative heterochromatin facultative heterochromatin [′fak·əl‚tād·iv ¦ hed·ə‚rō′krō·mə·tən] (genetics) Chromosomal material that may alternate in form and function between euchromatin and heterochromatin. facultative heterochromatin heterochromatin [het″er-o-kro´mah-tin] that state of chromatin in which it is dark-staining, genetically inactive, and tightly coiled.constitutive heterochromatin the chromatin in regions of the chromosomes that are invariably heterochromatic; it contains highly repetitive sequences of DNA that are genetically inactive and serves as a structural element of the chromosome.facultative heterochromatin the chromatin in regions of the chromosomes that become heterochromatic in certain cells and tissues; for example, it makes up the inactive X chromosome in female somatic cells. fac·ul·ta·tive het·er·o·chro·ma·tin nonrepetitive heterochromatin that comprises translatable sequences of DNA.
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