Mitosis occurs in somatic cells; this means that it takes place in all types of cells that are not involved in the production of gametes. Prior to each mitotic division, a copy of every chromosome is created; thus, following division, a complete set of chromosomes is found in the nucleus ...
It has previously been suggested that cancerous transformation may result in a shorter cell cycle =-=(34)-=- and, therefore, in a larger number of cell divisions. However, it is important to note that growth of a tumor cell population does not necessitate shortening of the cell cycle, ...
The major cause of whole chromosomal copy number change is mis-segregation at mitosis or meiosis, due to non-disjunction, checkpoint defects, cohesion defects, merotelic attachment of microtubules to kinetochores, multipolar mitotic spindles, or recombination or repair events generating dicentric and ...
division process of mitosis. Some parts of the tissues experience meiosis instead of mitosis. Meiotic division causes the splitting of the homologous chromosomes, thus reducing the ploidy of the daughter cells which are generated. The special gametes (sex cells) are the only haploid cells in the ...
B CHROMOSOME NONDISJUNCTION IN CORN: CONTROL BY FACTORS NEAR THE CENTROMERE B chromosomes of corn are stable at all mitotic and meiotic divisions of the plant except the second pollen mitosis. In the latter division, B chromosomes ... WR Carlson,TS Chou - 《Genetics》 被引量: 87发表: 1981...
(Schubert et al.2014). However, SIM investigations cannot determine the absolute number of molecules. The specific number and localization of proteins are required to understand their function in the chromatin organization of interphase nuclei and during cell divisions. Moreover, these data are ...
The most significant associations (P < 0.001) between copy number class and function were with genes having cell cycle, metabolic, or reproduction-related GO terms (reproduction-related categories contain many of the cell cycle genes due to the high rates of cell divisions in the germline re...
It has previously been suggested that cancerous transformation may result in a shorter cell cycle =-=(34)-=- and, therefore, in a larger number of cell divisions. However, it is important to note that growth of a tumor cell population does not necessitate shortening of the cell cycle, ...
After meiosis, synchronous mitotic divisions ultimately produce 512 nuclei within the sporangium. At maturity the cone-like depression in the apex of the sporangium everts, and biflagellate zoospores are released. Mitosis in the gametophytes appears to follow a normal pattern. Chromosome numbers of ...
MitosisPeaRoot-knot nematodeGiant cells induced by Meloidogyne sp. are characteristically enlarged and multinucleate. Each nucleus has more chromosomes than unaffected root tip cells. In Vicia faba, only euploid nuclei were detected (Huang & Maggenti, 1969) whereas in Pisum sativum euploid and ...