certain chromosomes

См. также в других словарях:

• CHROMOSOMES — Le terme de chromosome («corps coloré») a été introduit par Waldeyer en 1888 pour désigner les organites du noyau qui fixent facilement les colorants basiques. Chez les Eucaryotes, où le noyau est séparé du reste de la cellule par une membrane,… …   Encyclopédie Universelle

• Chromosomes polytènes — Chromosome polytène Chromosome polytène grossi 5000 fois …   Wikipédia en Français

• Chromosomes polyténiques — Chromosome polytène Chromosome polytène grossi 5000 fois …   Wikipédia en Français

• heredity — /heuh red i tee/, n., pl. heredities. Biol. 1. the transmission of genetic characters from parents to offspring: it is dependent upon the segregation and recombination of genes during meiosis and fertilization and results in the genesis of a new… …   Universalium

• Confined placental mosaicism — (CPM) represents a discrepancy between the chromosomal makeup of the cells in the placenta and the cells in the baby. CPM was first described by Kalousek and Dill in 1983.[1] CPM is diagnosed when some trisomic cells are detected on chorionic… …   Wikipedia

• heteropyknosis — n. [Gr. heteros, different; pyknos, dense] Certain chromosomes or regions of chromosomes that are out of phase in their coiling cycle and staining properties; heteropycnotic, heteropyknotic adj …   Dictionary of invertebrate zoology

• Heterochromatin — A genetically inactive part of the genome, heterochromatin was so named because it was chromosomal material (chromatin) that stained differently, more darkly, all through the cell cycle, than most chromosomal material (which was named… …   Medical dictionary

• heteropyknosis — The property of certain chromosomes, or of their parts, to remain more dense during the cell cycle and to stain more intensely than other chromosomes or parts …   Glossary of Biotechnology

• Copy-number variation — This gene duplication has created a copy number variation. The chromosome now has two copies of this section of DNA, rather than one. Copy number variations (CNVs) a form of structural variation are alterations of the DNA of a genome that results …   Wikipedia

• chromosome diminution — In embryogenesis, the elimination of certain chromosomes from cells that form somatic tissue …   Dictionary of invertebrate zoology

• secondary constriction — 1. a narrowed heterochromatic area of the short arm of an acrocentric autosome by which a satellite is attached; it is the site of the nucleolar organizing region (NOR). 2. a region of constitutive heterochromatin occurring on the long arm of… …   Medical dictionary