#chromatin  the readily stainable substance of a cell nucleus consisting of DNA and RNA and various proteins
  supertype:  body_substance  the substance of the body
  subtype:  sex_chromatin  chromatin found only in female cells; "the presence or absence of sex chromatin in cells obtained by amniocentesis makes it possible to determine the sex of a fetus"
  part of:  cell_nucleus__nucleus__nucleu__karyon  a part of the cell containing DNA and RNA and responsible for growth and reproduction
     part of:  cell  the basic structural and functional unit of all organisms; cells may exist as independent units of life (as in monads) or may form colonies or tissues as in higher plants and animals
        part of:  living_thing__organism__being  a living (or once living) entity that has (or can develop) the ability to act or function independently

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