Results 111 to 120 of about 3,770,877 (151)
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Meiotic behavior of five human reciprocal translocations
Cytogenetics and Cell Genetics, 2008Meiotic studies have been carried out in five human male translocation heterozygotes. An account of the cytological observations is given together with information concerning their reproductive history and fertility.
A C, Chandley +2 more
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Analysis of Meiotic Telomere Behavior in the Mouse
2016Linear eukaryotic chromosomes are capped by the telomeres, which consist of highly repetitive nucleotide sequences bound by several telomere-specific proteins. While the general role of telomeres is to protect chromosomes from degradation and end-to-end fusion, during meiosis they are assigned with a distinct and without doubt highly fascinating ...
Jana, Link +2 more
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Meiotic dysgenesis associated with behavioral mutants of Phycomyces
Current Genetics, 1983Phycomyces mutants, recently isolated for enhanced bending responses (hypertropic phenotype), have unusual genetic properties. In sexual crosses between hypertropic mutants and other strains, the progeny showed the following features: a) many incomplete tetrads, b) distortion of segregation ratios, c) progeny with nonparental phenotypes when ...
I, López-Díaz, E D, Lipson
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Meiotic behavior of rye heterozygous for ditelocentric substitutions
Cytogenetics and Cell Genetics, 2008Meiotic behavior has been investigated in rye plants carrying a heterozygous ditelocentric substitution for chromosomes 1R and 3R. Such a chromosomal rearrangement replaces a biarmed chromosome with two telocentrics, a situation karyotypically comparable to a Robertsonian translocation.
E, Benavente, J L, Santos
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Meiotic behavior of a supernumerary chromosome in Magnaporthe oryzae
Current Genetics, 2003A 1.2-Mb DNA band from an isolate of Magnaporthe oryzae was detected in a pulsed-field gel. A chromosomal entity corresponding to this band was observed at the mitotic metaphase stage. This minichromosome, carrying many transposable elements and two telomeres, was transmitted to ascosporic F(1) cultures in a non-Mendelian manner with frequent changes ...
I, Chuma +4 more
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The Meiotic Behavior of the Drosophila Oocyte
1970Publisher Summary This chapter discusses the events that take place during meiosis of the Drosophila oocyte. Prior to the meiotic prophase, the chromosomes attach to specific sites on the inner surface of the nuclear envelope. The chromosomes replicate their entire DNA except for the synaptomeres.
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Meiotic behavior of the X1X2Y1Y2 quadrivalent of the primateAlouatta caraya
Chromosome Research, 1996A multiple sex chromosome system was found in three unrelated individuals of the primate Alouatta caraya. This mechanism is originated by a translocation between the Y chromosome and one of the autosomes (A7). Mitotic karyotypes show two small, acrocentric chromosomes (AY and YA), which are the translocation products.
M I, Rahn +3 more
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The meiotic behavior of triploidy in a human 69,XXX fetus
Cytogenetics and Cell Genetics, 2008Meiotic studies were made on the fetal ovaries of a triploid fetus, 69, XXX. The association modalities of the three chromosomes in human triploidy are the same as those described in several plant species; i.e., trivalents, bivalents and univalents can be found in the same nucleus.
J M, Luciani +4 more
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Meiotic Behavior and Effects of B Chromosomes in Tall Fescue
Journal of Heredity, 1990Chromosome pairing and chiasma frequency were studied in seven genotypes of allohexaploid tall fescue (Festuca arundinacea Schreb., 2n = 6x = 42) from the Swiss ...
P P, Jauhar, C F, Crane
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Annual Review of Physiology, 2012
We review the critical events in early meiotic prophase in Drosophila melanogaster oocytes. We focus on four aspects of this process: the formation of the synaptonemal complex (SC) and its role in maintaining homologous chromosome pairings, the critical roles of the meiosis-specific process of centromere clustering in the formation of a full-length SC,
Cathleen M, Lake, R Scott, Hawley
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We review the critical events in early meiotic prophase in Drosophila melanogaster oocytes. We focus on four aspects of this process: the formation of the synaptonemal complex (SC) and its role in maintaining homologous chromosome pairings, the critical roles of the meiosis-specific process of centromere clustering in the formation of a full-length SC,
Cathleen M, Lake, R Scott, Hawley
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