26 results found

Search Results for: heterochromatin

Constitutive heterochromatin

Definition noun Regions on chromosomes that are condensed permanently, genetically inactive, and always in the same position... Read More

Heterochromatin

Definition noun Highly condensed, tightly packed form of chromatin, as opposed to the lightly packed... Read More

Facultative heterochromatin

Definition noun Heterochromatin that may lose its condensed state and becomes genetically active Supplement Heterochromatin... Read More

Constitutive heterochromatin banding

Definition noun (cytogenetics) A selective banding technique wherein a banding pattern is produced in the constitutive... Read More

Chromatin

Chromatin Definition What is chromatin in a cell? Chromatin is a complex of nucleic acids (e.g. DNA or RNA) and proteins... Read More

Euchromatin

Definition noun A slightly packed or partially condensed form of chromatin that contains structural genes and is usually... Read More

Giemsa banding

Definition noun (cytogenetics) A chromosome staining technique that employs Giemsa stain in order to produce a... Read More

Chromosome

Chromosomes Definition Chromosomes are the thread-like structure present in the nucleus of plant and animal cells.... Read More

Quinacrine banding

Definition noun (cytogenetics) A chromosome banding method that treats chromosomes with quinacrine dihydrochloride to reveal... Read More

Nucleus

In cell biology, the nucleus is the large, membrane-bounded organelle that contains the genetic material in the form of... Read More

Satellite DNA

Definition noun, plural: satellite DNAs (molecular biology) A portion of the DNA of a genome consisting of tandemly... Read More

Centromere

Definition noun, plural: centromeres The dense, constricted region containing highly-specialized repetitive DNA sequence,... Read More

Transcriptional silencing

transcriptional silencing (Science: molecular biology) mechanism of transcriptional control where dNA is bundled into... Read More

Tandem repeat

Definition noun, plural: tandem repeats (molecular biology) A type of repeated sequence in which the copies are repeated one... Read More

Acrocentric chromosome

Definition noun, plural: acrocentric chromosomes A chromosome whose centromere is subterminal resulting in its q arms being... Read More

Plasma B cell

Definition noun, plural: plasma B cells A large B lymphocyte that when exposed to antigen, produce, and secrete large... Read More

Nucleolar organizer region banding

Definition noun (cytogenetics) A chromosome banding method that employs silver staining to preferentially stain the... Read More

Telocentric chromosome

Definition noun, plural: telocentric chromosomes A chromosome whose centromere is placed very close to the end of the... Read More

T-banding

Definition noun (cytogenetics) A modified reverse chromosomal banding technique wherein the telomeres are strongly stained... Read More

Reverse banding

Definition noun (cytogenetics) A chromosome banding method that employs Giemsa staining technique that produces bands... Read More

Submetacentric chromosome

Definition noun, plural: submetacentric chromosomes A chromosome with a centromere located sub-median resulting in slightly... Read More

Arrhenotoky

Definition noun A form of parthenogenesis wherein male offspring develops from an unfertilized... Read More

Subtelocentric chromosome

Definition noun, plural: subtelocentric chromosomes A chromosome whose centromere is placed near the end rather than the... Read More

Metacentric chromosome

Definition noun, plural: metacentric chromosomes A chromosome in which the centromere is located in the middle resulting in... Read More

Holocentric chromosome

Definition noun, plural: holocentric chromosomes A chromosome in which the entire length of the chromosome seems to act as a... Read More

Nucleosome

Nucleosome Definition Every organism is made of deoxyribonucleic acid, also known as DNA. DNA is made up of numerous... Read More