Chromosome Fragile SitesFolic AcidChromosome FragilityChromosome MappingChromosomesChromosomes, HumanChromosome BandingFolic Acid DeficiencyChromosomes, Human, 6-12 and XHybrid CellsChromosomes, Human, Pair 21X ChromosomeNeural Tube DefectsChromosomes, Human, Pair 16Chromosomes, Human, Pair 7Chromosomes, Human, Pair 1Chromosome AberrationsChromosomes, Human, 16-18Chromosome BreakageChromosomes, Human, 1-3Sex ChromosomesKaryotypingIn Situ Hybridization, FluorescenceChromosomes, Human, Pair 11Chromosomes, Human, Pair 17Chromosomes, Human, Pair 6Chromosomes, Human, Pair 19Chromosomes, Artificial, YeastAphidicolinChromosomes, Human, Pair 22Chromosomes, Human, Pair 2Chromosome DeletionTetrahydrofolatesMolecular Sequence DataGenetic LinkageBase SequenceAcid Anhydride HydrolasesHomocysteineChromosomes, Human, Pair 9Chromosomes, Human, Pair 12Dietary SupplementsFood, FortifiedVitamin B 12Genetic MarkersVitamin B ComplexChromosomes, Human, Pair 8Chromosomes, Human, Pair 10Chromosomes, Human, Pair 4Chromosomes, Human, 13-15Chromosomes, BacterialChromosome PaintingChromosomes, Human, Pair 3Folic Acid AntagonistsChromosome SegregationChromosome DisordersChromosomes, Human, 21-22 and YChromosomes, FungalChromosomes, Human, Pair 13Chromosomes, Human, Pair 15Chromosomes, Human, 4-5Chromosomes, MammalianChromosomes, Human, Pair 5Preconception CareChromosomes, Human, Pair 20Chromosomes, Human, Pair 14Translocation, GeneticChromosomes, PlantDNAMetaphaseCloning, MolecularChromosomes, Artificial, BacterialSex Chromosome AberrationsFragile X SyndromeChromosome PairingChromosomes, Human, 19-20Chromosomes, Human, Pair 18Chromosomes, Human, XNucleic Acid HybridizationDNA, SatellitePedigreeChromosomes, Human, YRepetitive Sequences, Nucleic AcidCentromereFolate Receptors, GPI-AnchoredPhysical Chromosome MappingHyperhomocysteinemiaChromosome InversionRecombination, GeneticAmino Acid SequenceGenome, HumanSequence Tagged SitesChromosomal InstabilityAnemia, MacrocyticCosmidsBlotting, SouthernGenesDNA ReplicationChromosome PositioningDNA ProbesPolymerase Chain Reaction