[yoo-kroh-muh-tin] /yuˈkroʊ mə tɪn/

noun, Genetics.
the part of a chromosome that condenses maximally during metaphase and contains most of the genetically active material.
the part of a chromosome that constitutes the major genes and does not stain strongly with basic dyes when the cell is not dividing Compare heterochromatin

euchromatin eu·chro·ma·tin (yōō-krō’mə-tĭn)
Chromasomal material that consists of uncoiled dispersed threads during interphase, is genetically active, and stains lightly with basic dyes.


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