Ricki Lewis | Oct 19, 2003 | 9 min read
Thom Graves Media While genome sequencing may be the new kid on the block--perhaps now with a cracking voice and fuzzy facial hair--predicting phenotypes is the stuff of classical genetics, honed on the rare single-gene disorders, such as Huntington disease (HD) and cystic fibrosis (CF), which dominated the field in the last century (see Genetic Testing Timeline). "Geneticists today are portrayed as soothsayers of the future. But predictive medicine and testing has a significant history," says