Newborn Screening

Newborn screening is unique in being the only genetic testing that it is mandated by the state. The premise of newborn screening is that, for some dis-

This genetic test is positive for Trisomy 18. Fluorescence in situ hybridization reveals three copies of chromosome 18 (green) and female sex chromosomes (fuschia) within a nucleus (blue).

in vitro "in glass"; in lab apparatus, rather than within a living organism

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