Chondriosomal Mantle — 27 — Chromophobe 



Chromatin. — A densely staining substance in the nucleus; 

 the part of the chromosome that stains deeply with basic dyes 

 during mitosis. 



Chromatin Bridge. — Chromosome bridge, q.v. 



Chromatoid Bodies. — Chromophilic structures which occur 

 in the cytoplasm of spermatocytes. 



Chromatolysis. — The dissolution of chromatin. 



Chromatophore. — Chromoplast; a pigment cell in animals 

 or a pigmented plastid (not necessarily a chloroplast) in plants. 



Chromatoplasm. — (i) Vegetative protoplasm as distinct from 

 idioplasm, (ii) Pigmented granular protoplasm as opposed 

 to colourless achromatoplasm. 



Chromatospherite. — Nucleolus; a darkly staining body oc- 

 curring in the nuclei of most cells. 



Chromidia. — Particles of chromatin in the cytoplasm sur- 

 rounding the nucleus. 



Chromidiogamy. — The union, in gametic fertilization, of the 

 chromidia from the two parents. 



Chromidiosomes. — The minute particles of chromatin which 

 make up the chromidia. 



Chromiole. — A minute granule (possibly an artefact) form- 

 ing part of a chromomere. 



Chromoblast. — A proto-pigment-cell. 



Chromocentre. — (i) An agglomeration of chromatin in the 

 nucleus, (ii) Fused prochromosomes, (iii) An aggregation of 

 heterochromatin in salivary gland nuclei, cf. Heterochromatin. 



Chromocyte. — A pigment-cell. 



Chromogen. — A cell substance which oxidises to form pig- 

 ment. 



Chromogene. — Lindegren's (1946) term for the locus of a 

 gene. On this theory the gene is dual and consists of a chro- 

 mogene (locus) to which cytogenes are attached; both 

 chromogenes and cytogenes are self-duplicating but the latter 

 multiply independently in the cytoplasm, cf. Protosome, Epi- 

 some, Genosome. 



Chromomeres. — The chromatin granules of characteristic 

 size and position seen in the chromosome thread at prophase. 

 These granules are possibly identical with genes. 



Chromonema-ta. — The chromosome thread; the "optical 

 single thread within the chromosome" (Nebel). 



Chromophil, Chromophilic. — Staining heavily; staining 

 easily. 



Chromophobe, Chromophobic. — Difficult to stain. 



