Results 41 to 50 of about 37,794 (252)

Cytological studies on meiosis and male gametophyte development in autotetraploid cucumber [PDF]

, 2010
With improved staining and chromosome preparation techniques, meiosis of pollen mother cells (PMCs) and male gametophyte development in autotetraploid cucumber (Cucumis sativus L.) was studied to understand the correlation between chromosomes behaviour ...
C. -T. Qian, L. Cui, W. -P. Diao, J. -F. Chen, B. Jiang, S. -Y. Bao   +5 more
core   +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, Hultén, Maj A., Hultén Maj A   +2 more
core   +1 more source

On the origin of trisomy 21 Down syndrome [PDF]

, 2008
Background: Down syndrome, characterized by an extra chromosome 21 is the most common genetic cause for congenital malformations and learning disability.
Nikos Papadogiannakis, Maj A Hultén, Papadogiannakis, Nikos, Westgren, Magnus, Jonsson, Anna Maria, Tankimanova, Maira, Patel, Suketu D., Iwarsson, Erik, Maira Tankimanova, Anna Jonsson, Magnus Westgren, Erik Iwarsson, Hultén, Maj A., Suketu D Patel   +13 more
core   +1 more source

Histone modifications during tobacco male meiosis

Biologia Plantarum, 2019
The special and temporal distribution of several posttranslational histone modifications (H3K4me2, H3K4me3, H3K9me2, H3K27me2, H3K9ac, H3K14ac, H3K18ac, H3K27ac, H3S10ph, H3S28ph, H3T3ph, H3K4me1-H3T3ph, H3K4me3/H3T3ph H3T11ph, H2AT121ph, and H2A.XS139ph)
S. MURSALIMOV, E. DEINEKO, A. HOUBEN, D. DEMIDOV   +3 more
doaj   +1 more source

Serial Block-Face Scanning Electron Microscopy Reveals That Intercellular Nuclear Migration Occurs in Most Normal Tobacco Male Meiocytes

Frontiers in Plant Science, 2021
Serial block-face scanning electron microscopy (SBF-SEM) was used here to study tobacco male meiosis. Three-dimensional ultrastructural analyses revealed that intercellular nuclear migration (INM) occurs in 90–100% of tobacco meiocytes.
Sergey Mursalimov, Nobuhiko Ohno, Nobuhiko Ohno, Mami Matsumoto, Sergey Bayborodin, Elena Deineko   +5 more
doaj   +1 more source

The multicopy gene Sly represses the sex chromosomes in the male mouse germline after meiosis. [PDF]

, 2009
Studies of mice with Y chromosome long arm deficiencies suggest that the male-specific region (MSYq) encodes information required for sperm differentiation and postmeiotic sex chromatin repression (PSCR).
Yamauchi, Yasuhiro, Julie Cocquet, Nabeel A Affara, Burgoyne, Paul S., Yasuhiro Yamauchi, Cocquet, Julie, Affara, Nabeel A., Mahadevaiah, Shantha K., Ellis, Peter J.I., Peter J I Ellis, Monika A Ward, Shantha K Mahadevaiah, Ward, Monika A., Paul S Burgoyne   +13 more
core   +1 more source

DNA replication licensing in somatic and germ cells [PDF]

, 2004
The DNA replication (or origin) licensing system ensures precise duplication of the genome in each cell cycle and is a powerful regulator of cell proliferation in metazoa.
Williams, C, Jung, Hyo-Il, Obermann, EC, Ellen C. Obermann, Kai Stoeber, Loddo, Marco, Kathryn Leigh Eward, Marco Loddo, Shreeram, S, Williams, GH, Obermann, Ellen C, Hyo-Il Jung, Williams, Craig, J. Julian Blow, Gareth H. Williams, Eward, Kathryn Leigh, Fanshawe, Thomas, Jung, HI, Shreeram, S., Prevost, Toby; id_orcid, Blow, J. Julian; id_orcid, A. Toby Prevost, Loddo, M, Williams, Gareth H., Thomas Fanshawe, Fanshawe, T, Obermann, Ellen C., Eward, KL, Williams, Gareth H, Jung, H-I, S. Shreeram, Blow, J Julian, Prevost, A. Toby, Stoeber, K, Stoeber, Kai, Blow, J. Julian, Prevost, AT, Blow, JJ, Craig Williams   +38 more
core   +1 more source

Development of human male meiosis in vitro [PDF]

Hereditas, 2009
Testes material from 16 men was used to study the development of human meiosis in vitro. The present report deals with the results from the analysis of the cells from the organ cultures of five of these men. H3-thymidine was added to the culture medium for 75 to 90 minutes.
R, Ghatnekar, A, Lima-de-faria, S, Rubin, K, Menander   +3 more
openaire   +2 more sources

Chiasmate male meiosis in six species of water bugs from infraorders Nepomorpha and Gerromorpha (Insecta: Heteroptera)

Comparative Cytogenetics, 2009
The type of male meiosis is a stable character at the family level in the order Heteroptera and provides additional information on the relationships between taxa.
Snejana Grozeva, Seppo Nokkala, Nikolay Simov   +2 more
doaj   +1 more source

Forskolin and the meiosis inducing substance synergistically initiate meiosis in fetal male germ cells [PDF]

, 1993
Udgivelsesdato: 1993-JanWe have shown that Meiosis Inducing Substance (MIS) and forskolin synergistically and dose dependently induce meiosis in germ cells of cultured fetal mouse testes.
Fenger, M, Westergaard, L, Byskov, A G, Andersen, C Y   +3 more
core   +1 more source