نتایج جستجو برای: linkage disequilibrium
تعداد نتایج: 55581 فیلتر نتایج به سال:
Because defects in the phenylalanine hydroxylase gene (PAH) cause phenylketonuria (PKU), PAH was studied for normal polymorphisms and linkage disequilibrium soon after the gene was cloned. Studies in the 1980s concentrated on European populations in which PKU was common and showed that haplotype-frequency variation exists between some regions of the world. In European populations, linkage diseq...
Linkage results suggest that the region of chromosome 7 containing the leptin gene cosegregates with extreme obesity; however, leptin coding region mutations are rare. To investigate whether the leptin flanking sequence and/or a larger 40-cM region (7q22.1-7q35) contributes to obesity, we genotyped individuals from 200 European American families segregating extreme obesity and normal weight (1,...
Crohn's disease and ulcerative colitis, the two major forms of idiopathic inflammatory bowel disease (IBD), are heritable, complex traits that appear to share some but not all susceptibility loci. We report that transmission/disequilibrium test analysis of a Crohn's disease genome scan dataset has detected an inflammatory bowel disease locus on chromosome 3p26 (nominal P=0.000052 and genome-wid...
The expected value of the squared linkage disequilibrium is derived for a neutral locus associated with a chromosomal arrangement that is maintained in the population by strong balancing selection. For a given value of recombination, the expected squared linkage disequilibrium is shown to decrease as the intensity of selection maintaining the arrangement increases. The transient behavior of the...
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