Results 191 to 200 of about 11,759,752 (209)

Non‐equilibrium gene frequency divergence: persistent founder effects in natural populations

, 1992
The estimation of gene flow using gene frequency divergence information has become increasingly popular because of the difficulty involved in the direct determination of gene flow among populations. The present study examined allozyme gene frequencies in
M. Boileau, P. Hebert, S. S. Schwartz
semanticscholar   +1 more source

Estimation of the gene frequency of aceruloplasminemia in Japan

Neurology, 1999
Article abstract Aceruloplasminemia is a newly recognized autosomal recessive disorder of iron metabolism that causes neurodegeneration of the retina and basal ganglia as well as diabetes mellitus.
H. Miyajima, S. Kohno, Yoshitomo Takahashi, O. Yonekawa, T. Kanno   +4 more
semanticscholar   +1 more source

Gene Frequency Clines in the Presence of Selection Opposed by Gene Flow

American Naturalist, 1975
Suppose we have a cline in gene frequency which results from spatially varying selection forces (which tend to establish the cline) opposed by gene flow (which tends to blur the cline).
R. May, J. Endler, R. McMurtrie
semanticscholar   +1 more source

GENE FREQUENCY IN SMALL POPULATIONS OF MUTANT DROSOPHILA

, 1956
Studies of gene frequency changes in laboratory populations have for the most part been concerned with the systematic effects of selection and with discovery of the nature of the selective differences involved between genetic alternatives.
P. Buri
semanticscholar   +1 more source

Inferring Evolutionary Trees from Gene Frequency Data Under the Principle of Maximum Parsimony

, 1987
Most workers attempting to infer evolutionary trees from polymorphic data using established parsimony procedures either have ignored frequency information entirely or have tolerated "optimal" solutions that hypothesize ancestors that cannot possibly ...
D. Swofford, S. Berlocher
semanticscholar   +1 more source

Genetics of cerebrotendinous xanthomatosis (CTX): an autosomal recessive trait with high gene frequency in Sephardim of Moroccan origin.

American journal of medical genetics, 1981
We described 6 patients (from 3 families) affected with cerebrotendinous xanthomatosis (CTX). All are Sephardic Jews of Moroccan extraction. In view of the small number of CTX patients diagnosed in the world (a total of 50 including our 6 patients), we ...
V. Berginer, Dvorah Abeliovich, Dvorah Abeliovich, J. M. Opitz   +3 more
semanticscholar   +1 more source

Variation of female frequency and cytoplasmic male‐sterility gene frequency among natural gynodioecious populations of wild radish (Raphanus sativus L.)

Molecular Ecology, 2004
In gynodioecious plant populations, sex determination often involves both cytoplasmic male‐sterility (CMS) genes and specific nuclear genes that restore male function.
K. Murayama, T. Yahara, T. Terachi
semanticscholar   +1 more source

GENE FREQUENCY CLINES IN EUROPE: DEMIC DIFFUSION OR NATURAL SELECTION?

, 1996
According to the demic diffusion model ofCavalli-Sforza and colleagues, agriculture was spread through Europe by a rapid population expansion of early farmers from the Near East.
A. Fix
semanticscholar   +1 more source

Chance as a Cause of Changes in Gene Frequency Within Pure Breeds of Livestock

American Naturalist, 1946
Chance deviations in gene frequency from one generation to the next, as a result of Mendelian sampling and the elimination of potential parents, are important in the pure breeds of livestock.
J. Lush
semanticscholar   +1 more source

GENE FREQUENCY COMPARISONS BETWEEN SUNFISH (CENTRARCHIDAE) POPULATIONS AT VARIOUS STAGES OF EVOLUTIONARY DIVERGENCE

, 1977
Avise, J. C. and M. H. Smith (Department of Zoology, University of Georgia, Athens, GA 30602) 1977. Gene frequency comparisons between sunfish (Centrarchidae) populations at various stages of evolutionary divergence. Syst. Zool. 26:319-335.-A total of 11-
J. Avise, Michael H. Smith
semanticscholar   +1 more source