Results 41 to 50 of about 803,632 (356)
Chromosome counts of some Zingiberaceous species from Thailand [PDF]
Songklanakarin Journal of Science and Technology (SJST), 2002 The data on chromosome numbers of 22 species belonging to 10 genera of Zingiberaceae distributed in Thailand were investigated. The somatic numbers range from 20 to 48 showing diploidy and polyploidy.
Ladda Eksomtramage +3 more
doaj
Modeling meiotic chromosomes indicates a size dependent contribution of telomere clustering and chromosome rigidity to homologue juxtaposition [PDF]
, 2012 Meiosis is the cell division that halves the genetic component of diploid cells to form gametes or spores. To achieve this, meiotic cells undergo a radical spatial reorganisation of chromosomes.
Penfold, Christopher A. +19 more
core +1 more source
Circumnutation in the growth of Chara rhizoids
Acta Societatis Botanicorum Poloniae, 2014 The chromosome numbers of 24 species of Achillea L. were determined, among them 4 for the first time (A. chamaemelifolia, A. sulphurea, A. teretifolia, A. vermicularis). A tetraploid form of A. lingulata was found for the first time. The occurrence of di-
Janina Dąbrowska
doaj +1 more source
Cytogenetic study and pollen viability of three populations of Diplotaxis harra (Brassicaceae) in Iran [PDF]
Journal of Cell and Molecular Research, 2014 In this study, we examined the chromosome number, detailed male meiosis, microsporogenesis, pollen fertility and distribution of cytotypes of Diplotaxis harra (Forssk.) Boiss. This is the first cytogenetic report of the taxon.
Massoud Ranjbar, Somayeh Karami
doaj +1 more source
Is the Y chromosome disappearing?—Both sides of the argument [PDF]
, 2011 On August 31, 2011 at the 18th International Chromosome Conference in Manchester, Jenny Graves took on Jenn Hughes to debate the demise (or otherwise) of the mammalian Y chromosome.
Darren K. Griffin, Griffin, Darren K.
core +1 more source
Cytogenetic study of two Solenanthus Ledeb. species (Boraginaceae) in Iran [PDF]
Journal of Cell and Molecular Research, 2013 Chromosome number, meiotic behavior, and pollen viability were analyzed in 2 species of genus Solenanthus, S. stamineus (Desf.) Wettst. and S. circinnatus Ledeb, from Iran. This report is the first cytogenetic analysis of these species.
Massoud Ranjbar +2 more
doaj +1 more source
On the origin of crossover interference : a chromosome oscillatory movement (COM) model [PDF]
, 2011 Background: It is now nearly a century since it was first discovered that crossovers between homologous parental chromosomes, originating at the Prophase stage of Meiosis I, are not randomly placed.
Maj A Hultén +2 more
core +1 more source
bioRxiv, 2016 Chromosome number is a key feature of the higher-order organization of the genome, and changes in chromosome number play a fundamental role in evolution.
William A. Freyman, S. Höhna
semanticscholar +1 more source
Problematic octaploid forms and a new chromosome number in the genus Achillea L., 2n = 126
Acta Societatis Botanicorum Poloniae, 2014 Among the offspring of a problematic form of Achillea sp., a 2n = 126 seedling which probably arose as the result of fusion of unreduced octo- and hexaploid gametes (72 + 54) was found along with seedlings having an octaploid chromosome number (2n = 72).
Janina Dąbrowska
doaj +1 more source