منابع مشابه
Gametic Differentiation
A structural and biochemical study is presented concerning the agglutination of gametic flagella, the initial step in the mating reaction of Chlamydomonas reinhardtii. An alteration in the distribution of the intramembranous particles revealed by freeze-fracturing of flagellar membranes is shown to accompany gametic differentiation in both mating types. The isolation and electrophoretic analysi...
متن کاملThe Effect of Epistasis and Gametic Unbalance
ENETIC load has been defined as the extent to which an equilibrium population is impaired because not all individuals are of optimum genotype. The concept, first discussed by HALDANE (1937), is the basis of theory developed by CROW (1958) and others for assessing the relative impact of various facets of the genetic system (especially mutation, segregation and inbreeding) on the average fitness ...
متن کاملBasics of gametic imprinting.
The fundamental assumption of Mendelian genetics is that behavior of an allele is identical whether it arrives to a zygote through paternal or maternal germline pathway. Gametic imprinting phenomena discovered and studied in mammals show limitations of the classical view in special cases. Two sources of evidence were essential to describe gametic imprinting. The first approach based on genetic ...
متن کاملOn measures of gametic disequilibrium.
Various measures have been proposed for characterizing the statistical association that arises between alleles at different loci. Hedrick has compared these measures with the standardized measure D' proposed by Lewontin on the grounds that this latter measure is independent of allele frequency. Although D' has the same range for all allelic frequencies, in fact, D' is not "independent" of allel...
متن کامل[Capillary electrophoresis analysis of contaminants in heparin sodium for the Japanese pharmacopoeia purity test].
Heparin is widely used as an anticoagulant for the treatment and prevention of thrombotic disorders. Recently, hundreds of cases of anaphylactic reaction as adverse effects were reported by the presence of contaminating oversulfated chondroitin sulfate (OSCS) in some heparin preparations. In addition, these heparin preparations often contaminated dermatan sulfate (DS). Unfortunately, the Japane...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1924
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.10.6.222