Search results for "Chromosome analysis"

showing 4 items of 4 documents

Chromosome analysis of Bothus podas (Pisces, Pleuronectiformes) from the Mediterranean Sea

1993

A modal diploid number 2n=38 has been determined in both sexes of the pleuronectiform Bothus podas from the Gulf of Palermo (Mediterranean). An XX-XY sex-determining mechanism presumably occurs in this species. Application of silver staining (NORs) along with G- and C-banding techniques showed that secondary constrictions occurring in a large metacentric pair were variable in length in different fish. Polymorphisms of these areas seem to have a genetic, rather than transcriptional, basis.

Mediterranean climatemedicine.medical_specialtyCytogeneticsZoologyKaryotypeAquatic ScienceBiologyMediterranean seaChromosome analysisBothus podasmedicinePloidyNucleolus organizer regionEcology Evolution Behavior and SystematicsJournal of Fish Biology
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Patterns of male-specific inter-population divergence in Europe, West Asia and North Africa

2000

summary We typed 1801 males from 55 locations for the Y-specific binary markers YAP, DYZ3, SRY "!)$" and the (CA)n microsatellites YCAII and DYS413. Phylogenetic relationships of chromosomes with the same binary haplotype were condensed in seven large one-step networks, which accounted for 95% of all chromosomes. Their coalescence ages were estimated based on microsatellite diversity. The three largest and oldest networks undergo sharp frequency changes in three areas. The more recent network 3‐1A clearly discriminates between Western and Eastern European populations. Pairwise Fst showed an overall increment with increasing geographic distance but with a slope greatly reduced when compared …

MalehaplotypePopulation geneticsVariation (Genetics)phylogenyAfrica NorthernModelsY Chromosomegenetic variabilitypopulation dynamicsNorthernDinucleotide RepeatsGenetics (clinical)education.field_of_studyPhylogenetic treeGeographyarticlechromosome analysislinguisticsStatisticalEastern europeanEuropeGeographypriority journalMicrosatelliteWesternmarker geneAsiaEvolutionPopulationPopulationmicrosatellite DNA; article; Asia; chromosome analysis; controlled study; Europe; genetic variability; geographic distribution; haplotype; human; linguistics; male; marker gene; normal human; North Africa; phylogeny; population dynamics; priority journal; Africa Northern; Asia Western; Dinucleotide Repeats; Europe; Evolution Molecular; Genetics Population; Geography; Haplotypes; Humans; Male; Microsatellite Repeats; Models Genetic; Models Statistical; Variation (Genetics); Y ChromosomeY chromosomeEvolution MolecularGeneticGeographical distancegeographic distributionAsia WesternGeneticsHumanscontrolled studyhumannormal humaneducationModels StatisticalModels GeneticHaplotypeGenetic VariationMolecularNorth AfricaSettore BIO/18 - GeneticaGenetics PopulationHaplotypesEvolutionary biologyAfricamicrosatellite DNAMicrosatellite Repeats
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Langer-Giedion syndrome with interstitial 8q-deletion.

1982

We describe a 12-year-old girl with Langer-Giedion syndrome (tricho-rhino-phalangeal syndrome type II) who also had vertebral malformations. Chromosome analysis identified an interstitial del(8q): 46,XX,del(8)(pter leads to q22::q234 leads to qter) as a cause of this syndrome.

congenital hereditary and neonatal diseases and abnormalitiesmedicine.medical_specialtyChromosome DisordersNoseBone and BonesLanger–Giedion syndromeFingersChromosome analysisInternal medicineIntellectual Disabilityotorhinolaryngologic diseasesMedicineHumansAbnormalities MultipleChildGenetics (clinical)Chromosome AberrationsChromosomes Human 6-12 and XSyndrome typebusiness.industryAnatomySyndromemedicine.diseaseSpineChromosome BandingEndocrinologyKaryotypingFemaleChromosome DeletionbusinessAmerican journal of medical genetics
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Temporal changes of chromosomal polymorphism in natural populations of Drosophila subobscura

1984

The behaviour of the chromosomal polymorphism of D. subobscura was analyzed in relation to temporal changes, daily, seasonal and annual. Firstly, chromosome analyses were carried out over a year in a natural population. Samples were taken at monthly intervals in Tibidabo, a locality close to Barcelona. In all the months except January, the number of individuals captured was enough to carry out a chromosome analysis of that population. The A, E and O chromosomes showed a great uniformity in the frequencies of gene arrangement over the year. However, significant changes occur in the frequencies of J and U chromosomes. The J1 and U1+2+8 arrangements showed a similar tendency, with two maxima, …

Geneticseducation.field_of_studyPeriod (gene)PopulationZoologyChromosomePlant ScienceGeneral MedicineBiologyDrosophila subobscuraChromosome analysisNatural population growthInsect ScienceGeneticsChromosomal polymorphismAnimal Science and ZoologyTemporal changeeducationGenetica
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