Technology
The treatment of chromosomes to reveal characteristic patterns of horizontal bands. The banding patterns lend each chromosome a distinctive appearance so the 22 pairs of human non-sex chromosomes and the X and Y chromosomes can be identified and distinguished without ambiguity. Banding also permits the recognition of chromosome deletions (lost segments), chromosome duplications (surplus segments) and other types of structural rearrangements of chromosomes.
Diagnostic Methods
Technology
Light Microscopy is a technique for producing visible images of structures or details which are too small to be otherwise seen by the human eye. It involves passing light transmitted through or reflected from the subject through a series of lenses to be detected directly by the eye, imaged on a photographic plate, or captured digitally.
Diagnostic Methods
Technology
A novel karyotyping procedure which is based on the simultaneous hybridization of 24 chromosome-specific painting probes labeled with different fluorochromes or fluorochrome combinations. The measurement of defined emission spectra by means of interferometer-based spectral imaging allows for the definitive discernment of all human chromosomes in different colors. (from Schrock et al., Hum Genet 1997:101:255-62)
Diagnostic Methods