Chromosome segregation from cell hybrids. VII. Reverse segregation from karyoplast hybrids suggests control by cytoplasmic factors.
Using human and Chinese hamster established lines as cell parents, we constructed hamster-human cell hybrids and human cell - hamster karyoplast hybrids. The cell hybrids retained one or two sets of hamster chromosomes and lost most of the human chromosomes. The karyoplast hybrids, however, retained a full set of human chromosomes and lost most of the Chinese hamster chromosomes. This reverse segregation pattern implies that cytoplasmic factors are major determinants of the direction of chromosome segregation.
Graves
J A
JA
Department of Genetics and Human Variation, La Trobe University, Bundoora, Victoria, Australia.
Barbieri
I
I
D000818:Animals; D002467:Cell Nucleus / Q000502:physiology; D002875:Chromosomes / Q000502:physiology*; D006224:Cricetinae; D003412:Cricetulus; D003593:Cytoplasm / Q000502:physiology*; D006801:Humans; D006822:Hybrid Cells / Q000166:cytology; D007621:Karyotyping