Results 231 to 240 of about 5,667,091 (281)

Meiotic dysgenesis associated with behavioral mutants of Phycomyces

Current Genetics, 1983
Phycomyces 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
openaire   +2 more sources

Meiotic behavior of rye heterozygous for ditelocentric substitutions

Cytogenetic and Genome Research, 1993
Meiotic 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
openaire   +2 more sources

MEIOTIC CHROMOSOME BEHAVIOR IN MONOPLOID SUGARBEET

Canadian Journal of Genetics and Cytology, 1980
The meiotic behavior of a monoploid plant of sugarbeet (Beta vulgaris L.) was studied. At meta-anaphase I univalents, bivalents and trivalents, and secondary associations of up to three chromosomes were observed, with an average of 8.65 I + 0.16 II + 0.01 III per cell or 0.18 chiasmata per cell.
openaire   +1 more source

The Meiotic Behavior of the Drosophila Oocyte

1970
Publisher 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.
openaire   +2 more sources

Meiotic behavior of a supernumerary chromosome in Magnaporthe oryzae

Current Genetics, 2003
A 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, Y, Tosa, M, Taga, H, Nakayashiki, S, Mayama   +4 more
openaire   +2 more sources

The Molecular Control of Meiotic Chromosomal Behavior: Events in Early Meiotic Prophase in Drosophila Oocytes

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
openaire   +2 more sources

Meiotic Behavior in the Mushroom Collybia Maculata Var. Scorzonerea

Mycologia, 1968
(1968). Meiotic Behavior in the Mushroom Collybia Maculata Var. Scorzonerea. Mycologia: Vol. 60, No. 2, pp. 451-456.
openaire   +2 more sources

Meiotic Chromosome Behavior in a Human Male t(8;15) Carrier

Journal of Genetics and Genomics, 2014
Reciprocal translocation is one of the most common structural chromosomal rearrangements in human beings; it is widely recognized to be associated with male infertility. This association is mainly based on the abnormal chromosome behavior of the translocated chromosomes and sex chromosomes during meiosis prophase I in reciprocal translocation carriers.
Hanwei, Jiang, Liu, Wang, Yingxia, Cui, Zhipeng, Xu, Tonghang, Guo, Dongkai, Cheng, Peng, Xu, Wen, Yu, Qinghua, Shi   +8 more
openaire   +2 more sources

The unusual meiotic behavior of Elymus Wiegandii

Experimental Cell Research, 1950
At the onset of meiotic prophase, the meiocytes present a bizarre appearance (Figs. l-4). In ordinary meiosis the loosely reticulate fabric of the resting nucleus appears to ravel out into chromosome threads. Here, however, all the deeply staining part of the reticulum appears to gather, to be stripped from the threads, to coalesce into a number of ...
openaire   +1 more source

Meiotic behavior and DNA content in alloplasmic lines of maize

Genome, 1997
The cytoplasm of Zea mays ssp. mexicana (teosinte) affects several inherited traits when combined with genotypes of maize (Zea mays ssp. mays). The meiotic behavior and the total DNA content of four lines of maize with teosinte cytoplasm were compared with those of the parental lines. The results obtained suggest that the cytoplasm of teosinte promotes
L, Poggio, M, Rosato, C A, Naranjo
openaire   +2 more sources