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Nonmodal chromosome gain and loss in human fibroblast cultures.

Chromosome loss in cultured human lymphocytes has been found to be inversely correlated to chromosome size (Bloom et al., 1967; Neurath et al., 1970; Martin et al., 1980; Stallard et al., 1981; Wenger et al., 1984) while chromosome gain has been random (Brown et al., 1983; Wenger et al., 1984). It has been suggested that chromosome loss may be a technical artifact of slide preparation (Brown et al., 1983). To determine if nonmodal chromosome gain or loss is tissue-specific or related to culture conditions, long-term fibroblast cultures were evaluated in a manner similar to the studies indicated above