منابع مشابه
ABERRANT RECOMBINATION OF PYRIDOXINE MUTANTS OF Neurospora.
in the progenies. This result was offered in support of a two-phase model of crossing-over. Preliminary observations of the present authors had shown that aging had little or no effect at the late developmental stages at which somatic crossing over occurs, and, in an extensive series of tests, Schwartz's experimental findings were not confirmed. These results do not disprove the two-phase hypot...
متن کاملGenetic control of allelic recombination at the histidine-3 locus of Neurospora crassa.
T H E histidine-3 (his-3) locus of Neurospora crassa has aroused considerable interest because it 'controls not only the last step but also at least two early reactions in the biosynthesis of histidine (AHMED, CASE and GILES 1964; CATCHESIDE 1960, 1965). Complementation and genetic analyses of his-3 mutants, showing that noncomplemeiiting mutants, lacking all the three functions, appeared to be...
متن کاملAn apparent connection between histidine, recombination, and repair in Neurospora.
Two mutants of Neurospora crassa, uvs-3 and mei-3, share four properties--UV sensitivity, inhibition by histidine, meiotic blockage when homozygous, and increased duplication instability (due to mitotic crossing over, to deletions or to both). The present paper shows that a third nonallelic mutant, uvs-6, exhibits the same four properties.--Also, the instability of duplications in the absence o...
متن کاملSomatic recombination in pseudowild-type cultures of Neurospora crassa.
Populations in heterotic equilibrium show a greater percentage decrease than populations in mutational equilibrium, but the difference is very small for rare genes. Mortality and morbidity data on inbred offspring from consanguineous marriages cannot distinguish genes in one type of equilibrium from those in another. The current concept of genetic load is based on artefacts rather than on inher...
متن کاملGenes in Neurospora that suppress recombination when they are heterozygous.
Genes that suppress recombination when heterozygous have been found distributed as a polymorphism in wild and laboratory populations of Neurospora crassa. Three alleles, ssE, ssS and ssC, are associated, respectively, with th the three wild types Emerson, St. Lawrence 74A and Costa Rica A. It is proposed that ss (synaptic sequence) genes modulate recombination by determining the pairing closene...
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ژورنال
عنوان ژورنال: Genetics
سال: 1958
ISSN: 1943-2631
DOI: 10.1093/genetics/43.5.799