• 1 January 1979
    • journal article
    • research article
    • Vol. 31  (2) , 136-148
Abstract
Individuals and families were documented in which there are a number of fragile sites on chromosomes. These include sites at 2q11, 10q23, 11q13, 16p124, 16q22, 20p11 and Xq27 or 28. Fragile sites reported in the literature are compiled. The cytogenetics of the sites is discussed, and the phenotypic effects of the sites are considered. Homozygosity of the autosomal sites may be deleterious as is hemizygosity of the site on Xq. These sites are used in the previous report which documents the effect of tissue medium components on their expression.