A cytogenetic survey of an institution for the mentally retarded |
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Authors: | Janice Matsuura Martha Mayer Patricia Jacobs |
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Institution: | (1) John A. Burns School of Medicine, Department of Anatomy and Reproductive Biology, University of Hawaii, 1960 East-West Road, Biomedical Science Building A-204, 96822 Honolulu, Hawaii, USA |
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Abstract: | Summary Heteromorphisms of chromosomes 1,9, and 16 were studied by C-banding in a population of 403 mentally retarded individuals from diverse ethinic groups. A significant difference in the distribution of heteromorphisms was found among the different racial groups. The Orientals had a larger C-band on chromosome 1 and a smaller C-band on chromosome 9 than the other racial groups while the Caucasians had a larger C-band on chromosome 9. The Oriental group also had a significantly greater proportion of inverted C-band. No differences were found in the distribution of C-band heteromorphisms among different etiologic categories of mental retardation. |
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