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Genes in Biological Dictionary

Y chromosome

... base pairs (the building blocks of DNA) ... genes on the Y chromosome are among the estimated 20,000 to 25,000 total genes ... Y chromosome infertility is a ... researchers say that there is a dramatic loss of genes from the human Y chromosome that could ...

X chromosome

...... The X chromosome carries a couple thousand genes but few, if any, of these have ... The X ... base pairs (the building blocks of DNA) ... genes on the X chromosome are among the estimated 20,000 to 25,000 total genes ... X-chromosome or X chromosome ( ) n. ...

Tumor suppressor

... below, a large number of tumor suppressor genes ... Thus far, about 30 tumor suppressor ... a ... ) ( cell and molecular biology ) A class of genes which, when mutated, predispose an individual to ... source for information on Tumor Suppressor genes and Proteins. ... Search Tumor Suppressor ... ...

Transgenic plant

... Transgenic plants possess a gene or genes that have been transferred from a different ... that have been genetically modified by inserting genes directly into a single plant cell Transgenic plants possess a gene or genes that have been transferred from a ... 5 ...

Transgenic

... Transgenic plants possess a gene or genes that have been transferred from a different ... that have been genetically modified by inserting genes directly into a single plant cell ... crops which have been genetically modified with genes from ... Transgenic System, Transgenic ...

Tet resistance

... resistance to macrolides (10), and tet genes coding for ribosomal ... resistance genes have been found in anaerobes (3, 18), only the ... general a greater diversity of tet resistance genes was detected in the high ... were tested by PCR ...

Synteny

... ... synteny n. The condition of two or more genes being located on the same chromosome whether or ... Synteny refers to the occurrence of two or more genes on the same chromosome, ... A disrupted synteny refers to circumstances where a pair of genes are located on ... Synteny map. Human NCBI ...

Supergene

... A supergene is a group of neighbouring genes on a chromosome which are inherited together ... supergene ( ) n. A group of closely linked genes occupying a large chromosomal segment and ... ... Tutorial on how to create custom genes with JGAP to make up a genetic algorithm. ... In ...

Structural gene

... a promoter, and one or more structural genes gene n. A hereditary unit consisting of a ... in living organisms. ... The structural genes and the respective regulatory sequences ... than ... Operon - a cluster of structural genes that are expressed as a group and their ... and ...

Somatic hypermutation

... Rearrangements of the antigen receptor genes occur during ontogeny in B and T lymphocytes. ... 5-101-0022 ... Somatic hypermutation of Ig genes is probably dependent on transcription of the ... ... Somatic hypermutation of immunoglobulin genes is linked to transcription initiation. ... ...

SnRNA

... ... Transcription of the mammalian snRNA genes is directed by two promotor elements: ... The U1 through U5 snRNA genes are transcribed by RNA polymerase II, but lack ... the gene to ... Structure of U2 snRNA genes of Arabidopsis thaliana and their expression in ...

Single-gene disorder

... is an illness caused by abnormalities in genes or chromosomes. While some diseases, such as ... genetic disorders due ... Home > genes and the body > genes and disease > Background > Single gene ...

Sex-linked

... the same probability of expressing ... genes that are carried by either sex chromosome are ... . ... Many of the non- sex determining X-linked genes are responsible for abnormal ... This is sex - linked genes, genes located on one of the sex chromosomes (X or ...

Ribosomal DNA genes

... D. ... in the organization of ribosomal DNA genes during evolution: 1) gradual ... Natural variation in DNA methylation in ribosomal RNA genes of Arabidopsis thaliana. ... The ribosomal genes coding for the 45S rRNA precursor of the three ...

Repressor

... that regulates the expression of one or more genes by decreasing the rate of transcription. This ... protein which inhibits the expression of genes coding for proteins involved in the metabolism ... targets a specific co-regulated group of genes by recognizing a ... Britannica online ...

Reporter Gene

... in cell culture, animals or plants. Certain genes are chosen as reporters because the ... Roche Molecular Biochemicals. ... Reporter genes and Proteins ... reporter proteins in use: ... GFP expression from reconstituted reporter genes . 3. References ... ... be cited as: Boulin, ....

Repetitive DNA

... Interspersed repetitive DNA elements allow new genes to evolve. They do this by ... ... selective pressures from those acting on genes ... The repetitive DNA in the genome is ... 100's) of copies. Can be functionally important genes ... MEE: Repetitive DNA OH 18. rDNA rDNA rDNA ...

Recombination

... is the process by which the combination of genes in an ... However, in molecular biology, ... ... recombination , process of "shuffling" of genes gene, the structural unit of ... In ... One of the sources of those new combinations of genes is recombination . ... Get information, ...

Recessive

... recessiveness Failure of one of a pair of genes ( allele s) present in an ... The term ... inheritance occurs when both matching genes must be abnormal to ... Autosomal recessive . ... ... Recessive inheritance occurs when BOTH genes of a pair must be ... Dominant & ...

Recessive gene

... gene " ... Dominant & recessive genes : K-12 experiments, lesson plans, class ... that causes a ... Examples of recessive genes in Mendel's famous pea plant experiments ... The three criteria for identifying recessive genes : ... The recessive gene is present in the ...

Quantitative trait

... to the interactions between two or more genes and ... Quantitative genetics is the ... that the combined effect of the many underlying genes results in a continuous distribution of ... ... Each trait is controlled by a number of genes and is a quantitative trait . ... ...

Pseudoautosomal regions

... ) ( genetics ) Pertaining to segments ... of genes located on the x chromosome that are not in the ... of the human pseudoautosomal region (PAR) genes and the ... The pseudoautosomal regions of ... ... THE PSEUDOAUTOSOMAL REGIONS . genes IN HUMAN PAR1 AND PAR2. PAR1/PAR2 AND DISEASE ... ...

Positional cloning

... of interest. A genetic screen for new genes is often referred to as forward genetics as ... the term for identifying mutant alleles in genes ... Functional cloning involves using a ... can search through entire genomes to find genes of ... Brief and Straightforward ...

Polygenic inheritance

... to the interactions between two or more genes and ... The simple rules of Mendelian ... in the Rh blood factor. ... The role of many genes ( polygenic inheritance ) in production of a ... is quite complex, and the ways in which multiple genes ... ChessieInfo ... Polygenic Inheritance . ...

Polygenic disorders

... disorder is an illness caused by abnormalities in genes or chromosomes. While some diseases, such as ... to the interactions between two or more genes and ... Genetic disorders may result from defects in genes or from ... Polygenic ... cause of genetic ...

Polycistronic

... large polycistronic units, with the first 29 genes ... Analysis of processing of the metT ... most polycistronic transcripts comprise genes contributing ... because polycistronic mRNA ... back to your questio, polycistronic means many genes on 1 mRNA strand. ... Polycistronic mRNA is ...

Plastid

... a genetically modified plant in which the new genes have not been inserted in the nuclear DNA but in ... to initiate protrusions from the ... Plastid genes in higher plants are transcribed by two distinct ... ... plants a small family of nuclear genes encodes the plastid sigma factors. ... ...

Operon

... and an ... The lac operon . ... the genes in these operons appear — as in bacteria ... ... operon consists of a group of structural genes that code for enzymes ... Operon summary ... of E. coli controls ... This operon contains genes for the production of five proteins which are ...

Oncogene

... It is estimated that fully 1% of the 25,000 or so genes in the human genome are proto- oncogenes . ...... other ... Oncogene : (1) Any of a family of genes that normally ... Information about oncogene ... Free Trial, Credit Card Required. genes and Disease provides an introduction to the ...

Multiple alleles

... is human ... Each of the contributing genes can also have multiple alleles . ... Multiple ... most common is multiple alleles . ... but many genes have more than two different alleles --thus, " ... to three or more ... MULTIPLE ALLELES ... genes with 8 alleles can generate 36 genotypes ... ...

Multigenic disorder

... is an illness caused by abnormalities in genes or chromosomes. While some diseases, such as ... are multigenic , meaning that two or more genes are responsible for the disorder . ... ... disease—meaning it is caused by multiple genes that ... AMD is one of the few multigenic ...

Multi-gene family

... A gene family is a set of genes with a known homology. They are generally biochemically similar. genes are categorized this way into families, depending ... terms, ... Multi - gene family : A group of genes that are related by sequence homologies; ... ...

Mendelian inheritance

... the inheritance of traits linked to single genes ... Problem sets and tutorials from the ... Inheritance in Man, a database of human genes and genetic disorders developed by staff at Johns ... ... case, the modes of inheritance for the genes involved will ... ...

Mating type

... Heterologous expression of mating - type genes in filamentous fungi. ... Mating type ... locus in C. ... In addition, mating type genes can play important roles in the epidemiology and ... neoformans. ... Identification of Mating Type genes in the Bipolar Basidiomycetous Yeast ... ( ...

Maternal effect

... effect gene, bicoid. ... Maternal effect genes are a special class of genes that have their effect in the ... I'll explain ... portion of ... linked, maternal effect genes can also facilitate the evol ... wimp is a ...

Linkage map

... the linear order and genetic distance between genes in a linkage Genetic linkage Genetic ... genetic studies involving molecular tagging of genes ... position of centromeres on both classical ... analysis for linkage . Map distance ... map genes on chromosomes. Until modern gene mapping ...

Linkage group

... when particular genetic loci or alleles for genes are inherited jointly. Genetic loci on the same ... ... linkage group n. A pair or set of genes on a chromosome that tend to be transmitted ... (lngkj) ... linkage group - any pair of genes that tend to be transmitted together; "the ... ...

Lac repressor

... protein which inhibits the expression of genes coding for proteins involved in the metabolism ... protein which inhibits the expression of genes coding for Structural dynamics of the Lac ... The effect of the Lac repressor on the lac genes is referred to as negative regulation. ... The ...

Inverted repeat

... rather than the sequence that is ... The PAI genes are arranged as a tandem inverted repeat plus two singlet genes at unlinked loci. ... particular, the PAI1–PAI4 ... a transcribed inverted repeat of endogenous genes in Arabidopsis ... The PAI1-PAI4 inverted ...

Intergenic region

... of DNA sequences located between clusters of genes that contain few or no genes. Occasionally some intergenic DNA acts to control genes close by, but most of it has no currently known ... terms,biology abbreviations ... genes and intergenic regions , ... Full article > ...
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