Chromocenter

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neuter noun (biology / genetics / cytology)

Definition

A microscopic nuclear structure formed by the fusion or aggregation of the pericentromeric heterochromatic regions (centromeres) of multiple chromosomes during cellular interphase. This dense structural formation, frequently observed within the salivary glands of certain insects (such as the polytene chromosomes of Drosophila), appears under the microscope as an intensely stainable central mass from which the euchromatic chromosomal arms radiate, lacking direct transcriptional activity in that zone.

Bilingual Equivalents

  • Chromocenter
  • Chromocentre

Grammatical & Source Details

Inflection Type Neuter noun adapting across standard singular and structural plural variations.
Formation Learned compound combining 'acromo-' with 'center', designed to specify centromeric heterochromatin aggregates.
Spelling / Pronunciation [a.kro.mo.ˈt͡ʃen.tru]
Source Lexicon of Advanced Cytogenetics and Chromosomal Morphologies

Contextual Usage Examples

RO: Analiza microscopică a celulelor politemice a evidențiat un acromocentru voluminos din care porneau cele cinci brațe lungi ale cromozomilor.

EN: The microscopic analysis of polytene cells revealed a voluminous chromocenter from which the five long arms of the chromosomes originated.

RO: Geneticianul a explicat că acest acromocentru este compus aproape integral din ADN repetitiv și heterocromatină constitutivă inertă.

EN: The geneticist explained that this chromocenter is composed almost entirely of repetitive DNA and inert constitutive heterochromatin.

RO: Mutațiile induse experimental au provocat fragmentarea structurii de acromaturie, împiedicând asamblarea normală a unui acromocentru unic.

EN: Experimentally induced mutations caused the fragmentation of the achromatin structure, preventing the normal assembly of a single chromocenter.

Idioms & Phrases

Acromocentru cromozomial / Chromosomal chromocenter

RO: Zona centrală compactă și densă din nucleu unde regiunile centromerice ale cromozomilor se unesc în timpul stadiului de repaus celular.

EN: The compact and dense central zone in the nucleus where the centromeric regions of chromosomes unite during the cell resting stage.

Heterocromatină de acromocentru / Chromocenter heterochromatin

RO: Material genetic condensat și inactiv din punct de vedere transcripțional care formează corpul principal al agregatului nuclear.

EN: Condensed and transcriptionally inactive genetic material forming the main body of the nuclearaggregate.

Fuziune în acromocentru / Chromocenter fusion

RO: Procesul citologic structural prin care mai mulți centromeri se asociază fizic pentru a organiza o singură masă nucleară compactă.

EN: The structural cytological process whereby multiple centromeres physically associate to organize a single compact nuclear mass.

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