Results 181 to 190 of about 11,571 (204)

Diploidy and repair of radiation damage in saccharomyces mutants

Mutation Research/Fundamental and Molecular Mechanisms of Mutagenesis, 1973
Abstract Diploid wild-type cells of Saccharomyces and cells homozygous for one of the single genes r s 1 , r s 2 of the two alleles of the r s 3 gene (rad 2 gene) were tested for their response to ionizing irradiation in the presence and absence of oxygen. Both immediate and delayed plating (agar-holding) techniques were used.
D, Averbeck, M, Ebert
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Haploidy, Diploidy, and Polyploidy

1980
Haploidy is a general term for designating individuals or tissues (in mosaics) that have somatic cells with a gametic chromosome number (n).
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Diploidy restoration in Wolbachia-infected Muscidifurax uniraptor (Hymenoptera: Pteromalidae)

Journal of Invertebrate Pathology, 2002
Thelytokous reproduction, where females produce diploid female offspring without fertilization, can be found in many insects. In some Hymenoptera species, thelytoky is induced by Wolbachia, a group of cytoplasmically inherited bacteria. We compare and contrast early embryonic development in the thelytokous parthenogenetic species Muscidifurax uniraptor
Yuval, Gottlieb, Einat, Zchori-Fein, John H, Werren, Timothy L, Karr   +3 more
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GENETIC EVIDENCE FOR DIPLOIDY IN EQUISETUM

American Journal of Botany, 1986
Sporophytes and gametophytes of Equisetum arvense, E. laevigatum, and E. telmateia were analyzed using enzyme electrophoresis to estimate isozyme number. Despite their uniformly high chromosome numbers (2n = 216), these three species exhibited isozyme numbers typical of diploid seed plants for the enzymes AAT, ADH, ALD, GDH, [NADP]IDH, LAP, MDH, [NADP ...
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Diploidy in second trimester prostaglandin E₂induced abortuses

Journal of Paediatrics and Child Health, 1980
Second trimester abortuses induced by prostaglandin E2 were karyotyped. Twenty (11.9%) had chromosomal aberrations. These were diploid aberrations except for one case of double Y male. Twelve, however, were genetically balanced chromosomal rearrangements, and two had deletions of acrocentric G group chromosome short arms which should have no phenotypic
K H, Sit, H B, Wong
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Independent origins of diploidy in Metarhizium.

Mycologia, 2018
In fungi, stable diploid genome arrangements are rare. Here we present evidence from nuclear intergenic DNA sequencing, microsatellite genotyping, and configuration of the mating-type locus to demonstrate two independent origins of persistent diploid genome organization in the Metarhizium majus species complex.
Ryan M, Kepler, Yuan, Chen, James, Kilcrease, Jonathan, Shao, Stephen A, Rehner   +4 more
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The coexistence of haploidy and diploidy in yeasts

Experientia, 1959
In einigen Hefearten kommen haploide und diploide Zellen zusammen vor. Es wird angenommen, dass diese Koexistenz besondere Vorteile fur die Anpassung der Hefe an Milieux mit schnell wechselnden Bedingungen bietet. Die Vorteile der Haploidie und Diploidie erganzen sich, ohne dass sich die Nachteile der einen oder andern Form auswirken.
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Heterozygosity and Sex Determination in Haplo-Diploidy

The American Naturalist, 1971
Sex determination in haplo-diploid animals has been explained by P. W. Whiting's (1939) single-locus, multiple-allele scheme, which is applicable to two cases only, or by da Cunha and Kerr's (1957) genic-balance scheme, a more general hypothesis. I propose a general hypothesis of sex determination in haplo-diploidy, based on Snell's (1935) multiple ...
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Diploidy, Population Structure, and the Evolution of Recombination

The American Naturalist, 2009
In diploids, sex affects genetic variation through segregation and recombination. Several recent models on the advantage of recombination have focused on the effect of interaction between selection and drift in finite or structured populations; however, these models considered haploid organisms.
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On the potential for genetic variability in haplo-diploidy

Genetica, 1970
Some theory pertaining to the genetic variability of haplo-diploid species is examined. Genetic variability due to wholly deleterious alleles is reduced in haplo-diploid species compared with species with both sexes diploid, but a random numbers experiment suggests that there is no a priori reason to believe haplo-diploidy reduces the likelihood of ...
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