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Homologous in Biological Dictionary

Synapsis

... Synapsis is the pairing of two homologous chromosomes that occurs during meiosis. It is a ... Synapsis takes place during prophase I. When homologous chromosomes synapse, they come closer together ... n. , pl. -ses . The side-by-side association of homologous paternal and maternal chromosomes during the ...

Sister Chromatids

... by a centromere. Compare sister chromatids to homologous chromosomes, which are the two different copies ...... Is the choice between sister chromatid and homologous chromosome in the two ... At meiosis I, ... chromatids attach to the same spindle pole while homologous ... Cohesin is localized on paired sister ...

RecA protein

... and serves as an archetype for this class of homologous DNA ... RecA promotes the ... ... In vitro, RecA Protein helps promote homologous recombination through a multiple ... RecA ... promotes the exchange of strands between two homologous DNA ... In vitro, RecA protein alone can ...

Homologous recombination

... homologous recombination , also known as general ... DNA. The process involves several steps ... homologous recombination , also known as general ... DNA. The process involves several steps ... homologous Recombination Method (and ... final products ...

Homologous chromosomes

... homologous chromosomes are chromosomes in a biological ... that is due to their shared ancestry. The word homologous derives from the ancient Greek ομολογειν, ... are examples ... ... below illustrate a homologous pair of chromosomes before (on the ... Cells ...

Homologous chromosome

... homologous chromosomes are chromosomes in a biological ... chromosomes may have genes encoding ... homologous chromosomes are chromosomes with the same genes, but ... 3 homologous chromosome sets. 4 See also. 5 References. ...

Homologies

... homologies mean? ... homologies . homologous. homologous anaphylaxis. homologous artificial ... Animated image which ... homologies -·gies. the quality or state of being homologous ... Darwin ... Homologies . Hands Or Wings, ...

Synaptonemal complex

... The synaptonemal complex is a protein structure that forms between two homologous chromosomes during meiosis and that is thought to mediate chromosome ... " in the Visual Thesaurus. Pronunciation Symbols ... The phenomenon of homologous pairing and crossing-over is being analyzed in ... Later, a synaptonemal ...

Nondisjunction

... properly during cell division. This could arise from a failure of homologous chromosomes to separate in meiosis I, or the failure of sister ... mental retardation and ... Meiotic nondisjunction is the failure of homologous chromosomes ... The other maintains that the frequency of ...

Inverted Repeats

... Please ... " Inverted Repeat Structure of the Human Genome: ... Highly homologous Inverted Repeats That Contain Testes Genes" ... Inverted Repeats ... , Boston University ... Inverted repeats (IRs) consist of two arms of homologous DNA ... Interarm Interaction of DNA Cruciform Forming at a Short ...

Homology

... between characteristics that is due to their shared ancestry. The word homologous derives from the ancient Greek ομολογειν, 'to agree'. There are ... homology n. , pl. -gies . The quality or condition of being homologous. A homologous ... The word " homology " has several meanings in biology, each ... ...

Holliday structure

... type of exchange of genetic information he observed in yeast known as homologous ... (e) Resolution of the Holliday structure . ... The ... may see here the structure of a four-way Holliday -junction formed by homologous ... Eichman, The crystal structures of DNA Holliday junctions, Curr. ...

Gene targeting

... Gene targeting is a genetic technique that uses homologous recombination to change an endogenous gene . The method can be used to ... ′jēn ′tärgədiŋ ) ( genetics ) Replacement, by genetic engineering and homologous recombination, of a mutant (or wild-type) gene by a Gene Targeting ...

Gene duplication

... of a region of DNA that contains a gene ; it may occur as an error in homologous recombination, a retrotransposition event, or duplication of an entire ... Creation 20(1) 2006. ... Gene duplication occurs when an error in homologous recombination, a ... after a gene duplication event are ... Evolution ...

Branch migration

... all Temporary ... The branch migration substrates consist of two homologous duplex DNAs each ... Branch migration to the opposite end of the ... SUBSTRATES ... Rad54 protein, branch migration , Holliday junctions, homologous recombination, ... Improved support for the migration of branches ...

Alleles

... ... The alleles for a trait occupy the same locus or position on homologous ... refer to an organism's entire genetic makeup or the alleles at a ... ... The alleles for a trait occupy the same locus or position on homologous ... Recessive alleles are expressed in the phenotype when the ...

Zygotene

... with audio pronunciations, thesaurus, Word of the Day, and word games. zygotene ( ) n. The stage in prophase of meiosis during which homologous ... present in Zygotene meiosis I? ... Use of bouquet arrangement in zygotene stage? ... zygotene the second stage of the prophase of ...

Vestigial organ

... Vestigiality describes homologous characters of organisms which have seemingly lost all or most of their original function in a species through evolution. These may take various ...

T7 RNA Polymerase

... ... T7 RNA Polymerase is extremely sensitive to salt inhibition. ... Comparison of the T7 RNA polymerase structure with that of the homologous pol I ... The RNA polymerase (RNAP) from bacteriophage T7 has several advantages for use ... ... Structure of T7 RNA Polymerase . 3D ...

Site-specific recombination

... Recombination . Site - Specific Recombination . site - specific recombinases: enzymes that recognize. specific sequences and promote ... homologous and Site - Specific Recombination . 19.1 Introduction ... 19.17 Site - Specific Recombination Involves Breakage and Reunion ... ...

Sister chromatid

... Sister chromatids are identical copies of a chromosome connected by a centromere. Compare sister chromatids to homologous chromosomes, which are the two different copies of the same chromosome that diploid organisms (like humans) inherit, one from each parent. In ...

Sex cells

... Genetically unique sex cells combine at fertilization to form one-of-a-kind offspring. Humans are diploid organisms with two sets of homologous chromosomes, but we also contain haploid sex cells with one set and half the number. Sperm and Ova Gametes/ sex cells description of the ...

Sequence similarity

... In evolutionary biology, homology refers to any similarity between characteristics that is due to their shared ancestry. The word homologous derives from the ancient Greek ομολογειν, 'to agree'. There are examples ... In bioinformatics, a sequence alignment is a way of ...

Sequence homology

... In evolutionary biology, homology refers to any similarity between characteristics that is due to their shared ancestry. The word homologous derives from the ancient Greek ομολογειν, 'to agree'. There are examples ... In mathematics, particularly algebraic topology and ...

Restriction fragment

... is a genetic variation that can be detected by emzymatic digestion ... Restriction Fragment Length Polymorphism (RFLP) is a difference in homologous ... Restriction Fragment Length Polymorphisms. Torbert R. Rocheford ... material of plants, restriction fragment length polymorphism ...

Recombination nodules

... are ellipsoidal particles lying on the central ... The distribution of early recombination nodules on zygotene bivalents from plants. ... homologous chromosome synapsis and meiotic recombination are facilitated by several meiosis-specific structures: the synaptonemal complex (SC), and two ...

Recombination frequency

... from C0 to C3LR at ... Bacterial transformation and determination of recombination frequency . ... The frequency of intermolecular homologous recombination events was determined ... ...

Recombinase

... Recombinase Zoo (PDF 47KB). PRINT ... The European Bioinformatics Institute ... IPR006118 Recombinase , conserved site 6 - 14 ... a protein homologous to a site-specific recombinase . J. Bacteriol. ... Recombinase ,biological,biology dictionary,biology terminology,biology terms,biology ...

Recombination

... is one of several mechanisms leading to the variation ... More technically put, genetic recombination is the transmission-genetic process ... homologous Recombination Method (and Knockout Mouse) ... To perform homolgous recombination , you must know the DNA sequence of the gene ... A ...

Prophase

... All rights reserved. ... Prophase - the first stage of mitosis. The chromosomes condense and become visible ... Crossing over between homologous chromosomes at prophase I. ... (Redirected from Prophase I) Jump to: navigation, search ... This will take place during prophase I in ...

Physiology

... are composed. The principal level of focus of physiology is at the level of organs and systems. Most aspects of human physiology are closely homologous to corresponding aspects of animal physiology , ... Physiology , study of the physical and chemical processes that take place in ... ...

Phospholipid bilayer

... between the two monolayers of a lipid bilayer of a cell membrane. In humans, phospholipid scramblases constitute a family of five homologous ... different compounds (in particular cholesterol) into the phospholipid bilayer of ... within the phospholipid bilayer . Additionally, ...

Ovary

... ovary is an ovum-producing reproductive organ, often found in pairs as part of the vertebrate female reproductive system. Ovaries in females are homologous to testes in males, in that they are both gonads and ... In the flowering plants, an ovary is a part of the female reproductive ...

Multi-gene family

... PUBMED:2806546. ... ... is accelerated by all six members of the antiapoptotic BCL family " ... to clone members of a multi - gene family , homologous genes from different species, ... ... bacterium Pseudoalteromonas haloplanktis TAC 125: molecular characterization and gene cloning. Recombinant ...

Meiosis

... are the big ... The number of chromosomes is reduced from 46 to 23 during the process of meiosis . ... During meiosis , but NOT mitosis, the homologous chromosomes "find" each other ... Meiosis and the Formation of Eggs and Sperm. March 1, 2004 ... During the first stage of meiosis , the ...

Ligase

... ... Sedimentation analysis indicates that the ligase and kinase/CPD domains are ... tRNA ligase and T4 Rnl1 are functionally and structurally homologous proteins ... The European Bioinformatics Institute ... In human DNA ligase I (P18858), and in Saccharomyces cerevisiae (Baker's yeast) ... ...

Homozygous

... ... homozygous ho·mo·zy·gous (hō'mō-zī'gəs, -mə-, hŏm'ə-) adj. ... homozygous adj. Having the same alleles at a particular gene locus on homologous ... a homozygous dominant striped cat with a homozygous recessive spotted ... Zygosity This article relies largely or entirely upon a ...

Homozygote

... homozygote for cystic fibrosis (CF) received the CF ... homozygote n. An organism that has the same alleles at a particular gene locus on homologous ... What is the difference between homozygote and homozygous? ... Definition of homozygote from the Merriam-Webster Online Dictionary with ...

Homozygosity

... and zoo captive breeders to prevent homozygosity . ... homozygosity n. The condition of having identical genes at one or more loci in homologous chromosome ... What is homozygosity ? Post a question - any question ... ... Sciences > biology > genetics > genetic resources ...

Hfr cell

... cell does not become F+ or Hfr because the F factor does not transfer ... c. Recombination occurs between the DNA from the Hfr cell and the homologous ... a fixed starting point in the Hfr cell ... F- cell does not become F+ or Hfr ... demonstrated that the cell HFR directly impacts ...
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