EVOLUTION OF DNA-SEQUENCE HOMOLOGIES BETWEEN THE SEX-CHROMOSOMES IN PRIMATE SPECIES

被引:57
作者
LAMBSON, B [1 ]
AFFARA, NA [1 ]
MITCHELL, M [1 ]
FERGUSONSMITH, MA [1 ]
机构
[1] UNIV TENNESSEE,DEPT OBSTET & GYNECOL,MEMPHIS,TN 38103
关键词
D O I
10.1016/S0888-7543(05)80127-2
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Cloned DNA sequences from 18 X-Y homologous loci have been used to examine the evolution of regions of homology between the human X and Y chromosomes. The pattern of X-Y linkage in different primate species has enabled the charting of the chronology of their appearance and removal from the sex chromosomes during evolution. Examination of the pattern of differences in restriction enzyme sites at different loci has been used to estimate the degree of divergence in three different regions of homology. These studies have indicated that (1) blocks of homology have arisen at different points in evolution, (2) different regions of homology are heterogeneous in composition in that they contain X-Y homologous sequences of different age, and (3) the combination of X and Y locations together with the point of evolutionary origin has defined five new patterns of homology. © 1992 Academic Press, Inc. All rights reserved.
引用
收藏
页码:1032 / 1040
页数:9
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