Results 301 to 310 of about 319,606 (332)
Some of the next articles are maybe not open access.
Homologous chromosome recognition via nonspecific interactions
2023AbstractIn many organisms, most notablyDrosophila, homologous chromosomes in somatic cells associate with each other, a phenomenon known as somatic homolog pairing. Unlike in meiosis, where homology is read out at the level of DNA sequence complementarity, somatic homolog pairing takes place without double strand breaks or strand invasion, thus ...
Wallace F. Marshall, Jennifer C. Fung
openaire +2 more sources
Do homologous chromosomes differ?
Cytogenetic and Genome Research, 1979This paper is concerned with the problem of deciding whether measurements from homologous chromosomes differ. First, a general mathematical model is proposed for studying the distribution of chromosome measurements. Next, log-likelihood ratios are used to test for correlation between homolog pairs and for differences between homolog means and variances.
D.H. Moore II, A.V. Carrano, B.H. Mayall
openaire +1 more source
Philosophical Transactions of the Royal Society of London. B, Biological Sciences, 1977
Commonly accepted precepts are challenged : (1) that homologous chromosome pairing is normally mediated by nuclear envelope attachment sites; (2) that crossover site establishment awaits synaptic completion; and (3) that it is the function of the synaptonemal complex to hold homologues in register so that equal crossing over can occur, and perhaps to ...
openaire +2 more sources
Commonly accepted precepts are challenged : (1) that homologous chromosome pairing is normally mediated by nuclear envelope attachment sites; (2) that crossover site establishment awaits synaptic completion; and (3) that it is the function of the synaptonemal complex to hold homologues in register so that equal crossing over can occur, and perhaps to ...
openaire +2 more sources
Homologous Recombination Using Bacterial Artificial Chromosomes
Cold Spring Harbor Protocols, 2015This protocol introduces the technique of homologous recombination in bacteria to insert a linear DNA fragment into bacterial artificial chromosomes (BACs). Homologous recombination allows the modification of large DNA molecules, in contrast with conventional restriction endonuclease-based strategies, which cleave large DNAs into numerous fragments and
Cary, Lai +2 more
openaire +2 more sources
Human chromosome 9 pericentric homologies: implications for chromosome 9 heteromorphisms
Cytogenetic and Genome Research, 1998Pericentromeric polymorphisms of chromosome 9 include variations in the size of heterochromatin, pericentric inversions, and, more rarely, additional C-band-negative, G-band-positive material in either the proximal short arm or long arm or within the heterochromatin.
J P, Park +4 more
openaire +2 more sources
Chimpanzee chromosome 12 is homologous to human chromosome arm 2q
Cytogenetic and Genome Research, 1978Most of the 46 human chromosomes find their counterparts in the 48 chimpanzee chromosomes except for chromosome 2 which has been hypothesized to have been derived from a centric fusion of two chimpanzee acrocentric chromosomes. These two chromosomes correspond to the human chromosomes 2p and 2g.
N C, Sun, C R, Sun, T, Ho
openaire +2 more sources
Chromosomal homology in southern Akodon
Experientia, 1982Differential staining (G and C) of southern South American Akodon are presented. A. olivaceus, A. longipilis and A. sanborni all have the same karyotype (2n = 52, NF = 58). A virtually identical band sequence is observed. This situation is interpreted using the canalization model of chromosomal evolution which stresses an optimum karyotype for each ...
openaire +2 more sources
Do homologous chromosomes differ?
Cytogenetic and Genome Research, 1973Two statistics are derived for testing whether measurements on otherwise indistinguishable chromosome pairs differ. The power of these tests is shown as well as a method for estimating the true homolog means. The tests and estimation procedures are simple to compute, and their use is illustrated on chromosome data.
openaire +1 more source
Chromosome ends initiate homologous chromosome pairing during rice meiosis
Plant PhysiologyAbstract During meiotic prophase I, chromosomes undergo large-scale dynamics to allow homologous chromosome pairing, prior to which chromosome ends attach to the inner nuclear envelope and form a chromosomal bouquet. Chromosome pairing is crucial for homologous recombination and accurate chromosome segregation during meiosis.
Hanli You +11 more
openaire +2 more sources
Homologous Association of Oppositely Imprinted Chromosomal Domains
Science, 1996Human chromosome 15q11-q13 encompasses the Prader-Willi syndrome (PWS) and the Angelman syndrome (AS) loci, which are subject to parental imprinting, a process that marks the parental origin of certain chromosomal subregions. A temporal and spatial association between maternal and paternal chromosomes 15 was observed in human T lymphocytes by three ...
J M, LaSalle, M, Lalande
openaire +2 more sources