PMID: 8581300Dec 1, 1995Paper

ZOO-FISH analysis: cat and human karyotypes closely resemble the putative ancestral mammalian karyotype

Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology
G RettenbergerH Hameister

Abstract

DNA in situ hybridization with human chromosome specific DNA libraries was applied to compare the karyotypes of humans (Homo sapiens, 2n = 46) and cats (Felis catus, 2n = 38). For the autosomes alone, 30 segments of conserved synteny were revealed. The arrangement of these segments in the feline karyotype differs by only seven single chromosome breaks and one intrachromosomal inversion from their arrangement in humans. Comparison of these data with those recently obtained for pig and those available from conventional gene mapping studies in mice and cattle has allowed us to develop a model of karyotype evolution in mammals. The cat and human karyotypes, with 36 and 44 autosomes respectively, were found to be very similar to a putative ancient mammalian founder karyotype. It would appear that during evolution to the human karyotype the status quo has been conserved for at least some 100-120 million years. There has been no need to alter the well-balanced gene arrangement of the mammalian founder karyotype.

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Apr 1, 1996·Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology·T RaudseppB P Chowdhary
Apr 1, 1996·Mammalian Genome : Official Journal of the International Mammalian Genome Society·G RettenbergerH Hameister
Apr 1, 1996·Mammalian Genome : Official Journal of the International Mammalian Genome Society·G RettenbergerH Hameister
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