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Comparative Study
. 1978 Mar 17;41(2):121-30.
doi: 10.1007/BF00273094.

Minor chromosome variations and selected heteromorphisms in 200 unclassifiable mentally retarded patients and 200 normal controls

A T Tharapel, R L Summitt
Comparative Study

Minor chromosome variations and selected heteromorphisms in 200 unclassifiable mentally retarded patients and 200 normal controls

A T Tharapel et al. Hum Genet. .

Abstract

Lymphocyte chromosome preparations from 200 mentally retarded children and 200 normal adult controls were analyzed by G-, Q-, and C-banding techniques for minor chromosome variations (G and Q) and selected heteromorphisms (G and C). Minor variations scored included inv(9), prominent or decreased short arms and/or satellites on acrocentric chromosomes, and 17 ph. C heteromorphisms analyzed included those involving 1qh, 9zh, and 16zh regions. Length variations of Yq were scored on G-banded karyo types. No significant differences in frequencies of scored minor variations or heteromorphisms were noted between the retarded and control populations.

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