fragile site

[frăjəl]

n.

A nonstaining gap at a specific point on a chromosome that usually involves both chromatids and always appears at exactly the same point on chromosomes of different cells from an individual or kindred.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.