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Chromosome in Biological Dictionary

Y chromosome

... The Y chromosome is the sex-determining chromosome in most mammals, including humans. In mammals, ... thus determining sex. The human Y chromosome is composed of ... The Y ...

X chromosome

... The X chromosome was named for its unique properties by early researchers, and ... The X chromosome carries a couple thousand genes but few, if any, of these have ... The X chromosome spans about 155 million base pairs (the ...

Trisomy

... Trisomy 9 Classification and external resources chromosome 9 ICD - 10 Q 92. ICD - 9 758 DiseasesDB 32657 ... trisomy -- the presence of a part of an extra chromosome 13 in the cells. ... The Trisomy 18 Support ... ... Each pair of chromosomes contains one chromosome from each parent. Trisomy 18, also ... Only ...

Translocation

... In genetics, a chromosome translocation is a chromosome abnormality caused by rearrangement of parts ... to a new position, especially on a nonhomologous chromosome ... Translocation ... Other chromosomal ...

Synteny

... genetic loci have been assigned to the same chromosome but still may be separated by a large enough ... of two or more genes being located on the same chromosome whether or not there is demonstrable linkage ... (sin'tĕ-ne) the presence together on the same chromosome of ... Welcome to Synteny Systems. Contact: ...

Sister Chromatids

... Sister chromatids are identical copies of a chromosome connected by a centromere. Compare sister ... which are the two different copies of the same chromosome that diploid organisms (like humans) inherit, ... between sister chromatid and homologous chromosome in the two ... At meiosis I, sister ...

Sex chromosome

... system, females have two of the same kind of sex chromosome ... A look at the two human sex ... genes. ... These sex linked genes on the X chromosome display a number of characteristics. ... ... ... screen makes him unable to pass on his Y chromosome ... The X in Sex : How the X ...

Sex chromosomes

... different from the other. ... Genes on the X chromosome are referred to as sex -linked, or X-linked, ... Encyclopedia, computing dictionary. Sex chromosome abnormalities occur as a result of chromosome mutations brought on by mutagens or problems ...

Polytene

... /wiki/ polytene " ... polytene chromosome ( ′päli′tēn ′krōmə′sōm ) ( genetics ) A giant, multistranded, chromosome produced by multiple sounds of ... (stage a3) and a DNA ... During polytene chromosome degradation the 30 nm chromatin loops are ...

Open reading frame

... for C21orf34 gene (protein-coding), chromosome 21 open reading frame 34 ... the only ... information for C9orf41 gene (protein-coding), chromosome 9 open reading frame 41 ... chromosome 9 open reading frame 41 1, 2. hypothetical ...

Nondisjunction

... Nondisjunction is the failure of chromosome pairs to separate properly during cell ... with an imbalance of chromosomes. When a single chromosome is ... When the separation is not normal, ... risk factors for maternal nondisjunction of chromosome 21 are increased ... As nondisjunction is the ...

Mosaicism

... occur in the same ... Mosaicism caused by chromosome nondisjunction. ... Mosaicism is a ... makeup. ... Mosaicism can be found through chromosome evaluation or ... But in mosaicism , some ... within the ... Mosaicism can be found through chromosome evaluation or microarray analysis. ... In ...

Loci

... locus (plural loci ) is a fixed position on a chromosome such as the position of a biomarker that may be ... ... Simple Locus Search ... Locus Overview By chromosome These tables provide a summary of data for the ... blog. Locus (genetics) Short and long arms chromosome components: (1) Chromatid (2) Centromere (3) ...

Linkage group

... inherited jointly. Genetic loci on the same chromosome are physically connected and tend to stay ... linkage group n. A pair or set of genes on a chromosome that tend to be transmitted together. ... an ... ... linkage group Genes linked to the same chromosome that ... ... in hunting disease genes. Web ...

Lampbrush

... A Lampbrush chromosome is a large chromosome found especially in the oocytes (immature ... that form many ... lampbrush chromosome ( ) n. A large ...

Homologous chromosomes

... occur in homologous pairs. ... Homologous chromosome summary with 3 pages of encyclopedia entries, ... and other additional information on Homologous chromosome from Biology-Online.org dictionary. ... 1, the ... the same genes in the ... When the homologous chromosome pairs separate (in anaphase I), and when, ... ...

Homologous chromosome

... with the same genes, but ... 3 Homologous chromosome sets. 4 See also. 5 References. 6 Further ... and other additional information on Homologous chromosome from Biology-Online.org dictionary. ... 1, the ... Variation ... This occurs when homologous chromosome pairs line up during Metaphase I of Meiosis. ... ...

Hfr cell

... is designated F+) or become integrated into the chromosome (such a cell is designated Hfr ). F+ and Hfr ... ... When Hfr mates with an F- cell , the chromosome acts as a rolling circle ... Hfr , cell ... terms,biology abbreviations ... As the chromosome of the Hfr cell replicates it may begin to .....

Genetic map

... inherited jointly. Genetic loci on the same chromosome are physically connected and tend to stay ... maps of female ... A genetic map of chromosome 9 (the one that carries the C, Sh, and bz loci) ... map is a representation of the genes on a chromosome arrayed in ... A. Genes on the physical and ...

Gene linkage

... inherited jointly. Genetic loci on the same chromosome are physically connected and tend to stay ... Also, the location of a particular gene on a chromosome is called a gene locus. Linkage map ... ... ... In 1985, the gene was mapped to chromosome 7q31-q32 by linkage analysis. ... channel (web ...

G-banding

... patterns as those of domestic ... Comparative chromosome G-banding analysis of long-tailed ... By using G-banding , the macaque chromosome 5, 12, 13, 19 and X are identical to those of ... blood and bone marrow is presented. ... improve chromosome G-banding in fresh blood ... The use of ...

Flow karyotyping

... Lister Hill National Center for Biomedical ... chromosome heteromorphism quantified by high-resolution ... flow karyotyping for the detection of chromosome abnormalities. ... ... laser flow cytometry ... flow karyotypes were obtained in all ... chromosome sorting using flow cytometry is of great ...

Euploidy

... . Variation in the number of complete sets of chromosome ... euploidy . euploidy . variations are ... Euploidy Organisms with multiples of the basic chromosome set are called euploid. ... A series of ... spindle checkpoint: tension versus attachment ... chromosome Bi-Orientation: Euclidian Euploidy . Jason ...

Dicentric

... Dicentric chromosome is an aberrant chromosome having two centromeres. Dicentric chromosomes form when two chromosome segments, each with a centromere, fuse end to ...

Deletion

... deletion is a mutation in which a part of a chromosome or a sequence of DNA is missing. Deletion is ... ... Deletion (genetics) Deletion on a chromosome In genetics , a deletion (also called gene ... of origin of the deletion . ... Table 1. chromosome Abnormalities Seen in 1p36 Deletion ... ...

Daughter Chromosome

... as ... The daughter cells have one chromosome from each homologous pair. ... 3. ... ... the onset of anaphase, each daughter chromosome possesses one centromere and one ... Brief ... protective bits of DNA on the end of a chromosome [citation needed] ... H. In mitosis, two ...

Contig map

... contig ( kən′tig ) ( genetics ) A region of chromosome defined by its hybridization ... A contig ... with medical definitions ... A contig is a chromosome map showing the locations of those regions of ... region of the dog genome is shown in ... A chromosome map showing the locations of those regions of ...

Complete linkage

... During reproduction, chromosomes on the same chromosome pair, exchange sections of DNA. As a ... ... that are located close together on the same chromosome with no crossing over between them. ... © ... assortment and complete linkage . Chiasma chromosome theory complete linkage crossing over. ...

Circular chromosomes

... A chromosome is an organized structure of DNA and protein ... Bacteria) typically have a single circular chromosome , but many variations do exist. ... essentially ... 1964; Stahl, 1967; Bendich, ... conclude that a chromosome is circular . both for chloroplasts and ...

Chromosomes

... A chromosome is an organized structure of DNA and protein that is found in cells. A chromosome is a single piece of coiled DNA containing many ... are carried on nuclear chromosomes . ... chromosome , microscopic structure within cells that ...

Chromosome walking

... makes a basic mistake, I think: If you are chromosome walking , you are not necessarily sequencing. ... the ... Encyclopedia information on chromosome Walking ... chromosome walking is a technique for cloning ...

Chromosome walk

... makes a basic mistake, I think: If you are chromosome walking, you are not necessarily sequencing. ... the ... Encyclopedia information on chromosome Walking ... chromosome walking is a technique for cloning ...

Chromosome jumping

... chromosome jumping is a technique of molecular biology ... other tools used for the same purpose, including chromosome walking. Primer walking is a sequencing ... insert, a PCR product or ... Jumping into chromosome 2. By Bijal P. Trivedi. August 25, 2000 ... ...

Chromosome

... A chromosome is an organized structure of DNA and protein ... sequences. Chromosomes also ... chromosome ( ) n. A threadlike linear strand of DNA and ... the genes and functions in X-chromosome or X chromosome ( ) n. The sex ...

Chromomere

... of a continuous DNA thread. It is visible on a chromosome during the prophase of meiosis and mitosis. ... of concentrated chromatin that constitutes a chromosome during the early phases of chromomere ... chromomere is relatively constant for each chromosome and ... Zoology information, history, ...

Chromatid

... places at Britannica. Assorted References chromosome duplication ( in chromosome (biology) ) At the onset of cell division, the ... sheath, forming a tiny rod, or chromosome. Each chromosome actually consists of a set of duplicate ...

Centromere

... of DNA typically found near the middle of a chromosome where two identical sister chromatids come in ... Sister chromatids are identical copies of a chromosome connected by a centromere . ... Examples of ... of the centromere is constant for a specific chromosome and is ... Easy-to-use, talking glossary of ...

Centimorgans

... (plural centimorgans ) (Biology) A length of chromosome in which an average of 0.01 crossover occurs ... of 1% has historically been ... Similarly, chromosome 2 in Drosophila is about 108 centimorgans ... by mapping genes in order down a chromosome and add up the ... gene A to gene C is 70 ...

Barr body

... sex is determined by the presence of the Y or W chromosome rather than the diploidy of the X or Z, a Barr body is the inactive X chromosome in a female ... The Barr body is ... bodies . 2.6.1 Expressed genes on the inactive X chromosome ... What is Barr body ? Meaning of Barr ...

Autosomes

... An autosome is a chromosome that is not a sex chromosome – that is to say there are an equal number of copies of the chromosome in males and females. For example, in humans, ...
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