Chromosome identification.
D002869:Chromosome Aberrations / Q000175:diagnosis*; D025063:Chromosome Disorders; D002874:Chromosome Mapping; D002875:Chromosomes; D003582:Cytogenetics / Q000266:history; D004314:Down Syndrome / Q000175:diagnosis; D005817:Genetic Counseling; D006801:Humans; D007621:Karyotyping; D008854:Microscopy, Electron; D008856:Microscopy, Fluorescence; D011296:Prenatal Diagnosis; D013194:Staining and Labeling