X mapping in man: evidence against direct measurable linkage between ocular albinism and deutan colour blindness.
نویسندگان
چکیده
A Newfoundland kindred in which ocular albinism and deutan colour blindness are segregating provides strong evidence against the loci for these two X-borne characters being within direct measurable distance of each other.
منابع مشابه
Linkage between the loci for benign (Becker-type) X-borne muscular dystrophy and deutan colour blindness.
et. al, 1968/1969) and give an estimate of 0-23 for the recombination fraction with 9500 confidence limits of 0-13 to 0 43. These results confirm the linkage relationships between deutan colour blindness and Becker muscular dystrophy but since the loci for Duchenne muscular dystrophy and colour blindness are not within measurable distance of each other these results indicate that the Becker and...
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A Sardinian kindred segregating for X-linked anhidrotic ectodermal dysplasia (AED), glucose-6-phosphate dehydrogenase (G6PD) deficiency of Mediterranean type, and Xga blood antigen provides evidence against a measurable linkage between the loci for AED and G6PD. Moreover, from the segregation of the combined phenotypes in four scorable sons from two triple heterozygotes with phase known, it see...
متن کاملGenetic mapping of X linked ocular albinism: linkage analysis in British families.
Genetic linkage studies were performed in 16 British families affected by X linked ocular albinism (XLOA) using RFLPs from the Xp22.3 region. Linkage was confirmed between the XLOA locus (OA1) and the loci DXS143 (dic56; Zmax = 15.90 at theta = 0.0, confidence interval (CI) 0-0.035), DXS85 (782; Zmax = 15.67 at theta = 0.04, CI = 0.007-0.11), and DXS237 (GMGX9; Zmax = 12.65 at theta = 0.08, CI ...
متن کاملLinkage disequilibrium for two X-linked genes in Sardinia and its bearing on the statistical mapping of the human X chromosome.
The distribution of four X-linked mutants (G6PD, Deutan, Protan and Xg) among lowland and once highly malarial populations of Sardinia discloses a clear-cut example of linkage disequiligrium between two of them (G6PD and Protan). In the same populations the distribution of G6PD-deficiency versus colorblindness of the Deutan type and the Xg blood-group is not significantly different from that ex...
متن کاملGenetic mapping of a cone and rod dysfunction (Aland Island eye disease) to the proximal short arm of the human X chromosome.
A five generation family with an X linked ocular disorder has been investigated. The major clinical features were reduced visual acuity, nystagmus, and myopia. Although impaired night vision was not a symptom, using psychophysical and electrophysiological testing both rod and cone function were found to be abnormal in all affected males. No abnormality was detected in carrier females. Gene loca...
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عنوان ژورنال:
- Journal of medical genetics
دوره 13 4 شماره
صفحات -
تاریخ انتشار 1976