Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «C»:
Chromatids: The daughter strands of a duplicated chromosome
joined together by a centromere. ...
Chromatin: The nucleoprotein material of chromosomes. Chromatin is essentially the substance of chromosomes. It is made up of DNA attached to a protein structure, together with chromosomal RNA. Chromatin exists in two states, euchromatin and heterochromatin, with different staining and functional p...
Chromatin modeling: See: Chromatin remodeling....
Chromatin modelling: See: Chromatin remodeling.
Chromatin remodeling: Dynamic structural changes to the chromatin occurring throughout the cell division cycle. These changes range from the local changes necessary for transcriptional regulation to global changes necessary for chromosome segregation. Chromatin remodeling is an epigenetic phenomenon...
Chromatin remodelling: See: Chromatin remodeling....
Chromatography, gas (GC)
Chromatography, gas (GC):
A type of automated chromatography (a technique used to separate mixtures of substances) in which the mixture to be analyzed is vaporized and carried by an inert gas through a special column and thence to a detection device. The special column can contain an inert porous so...
Chromatophobia: An abnormal and persistent fear of money. Sufferers experience undue anxiety even though they realize their fear is irrational. They worry that they might mismanage money or that money might live up to its reputation as "the root of all evil." Perhaps they remember well the ill fort...
Chromesthesia: A type of synesthesia in which which a nonvisual stimulus causes the individual to perceive color. Color hearing is a form of chromesthesia. In color hearing a musical tone elicits a color. One well-studied case involved an art teacher who had a range of consistent linkages between to...
Chromosome: A visible carrier of the genetic information.
The 3 billion bp (base pairs) in the human genome are organized into 24 distinct, physically separate microscopic units called chromosomes. All genes are arranged linearly along the chromosomes. The nucleus of most human cells contains two ...
Chromosome 1: The largest human chromosome, comprising approximately 10% of the human genome. Chromosome 1 contains over 240 million base pairs and over 3000 genes including the UROD gene for porphyria cutanea tarda, the GBA gene for Gaucher disease, the GLC1A gene for glaucoma, the HPC1 gene for p...
Chromosome 11 childhood leukemia
Chromosome 11 translocation leukemia: A new type of childhood leukemia in which a piece of chromosome 11 has been translocated (broken off and attached itself to another chromosome). Children with this type of leukemia have a particularly poor prognosis (outlook). They do not respond at all well to ...
Chromosome 2: The second largest chromosome in the human genome. Chromosome 2 contains over 240 million base pairs and more than 2500 genes, including the ETM2 gene for essential tremor, the MSH2 and MSH6 genes for colon cancer, and the PAX3 gene for Waardenburg syndrome.
The ETM2 gene for essentia...
Chromosome 3: One of the largest human chromosomes, comprising approximately 6.5% of the human genome. Chromosome 3 has between 1,100 and 1,500 genes of the estimated 30,000 to 40,000 genes in the human genome. Among the genes on chromosome 3 are the HGD gene for alkaptonuria, the BTD gene for biot...
Chromosome 4p- syndrome
Chromosome 4p- syndrome: The 4p- syndrome or Wolf-Hirschhorn syndrome, is a chromosome disorder due to partial deletion of the short (p) arm of chromosome 4. It is, therefore, also called the 4p- syndrome.
Features of the syndrome include midline defects with a scalp defect, widespaced eyes, broad o...