critical region

critical region

[′krid·ə·kəl ′rē·jən]

(genetics)

The shortest segment of a chromosome whose gain or loss results in a particular complex phenotype, such as Down syndrome.

(statistics)

In testing hypotheses, the set of sample values leading to rejection of the null hypothesis.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.