Prophase is a stage in cell division, particularly in meiosis I, where proper orientation and segregation of homologous chromosomes occur through pairing, synapsis, and recombination. It is longer in meiosis compared to mitosis, lasting many days in males and many years in females. ...
Meiosis 1: Meiosis 1 splits a pair of homologous chromosomes and converts a diploid cell to a haploid cell. The following phases help explain the various stages of meiosis 1: Prophase 1: Prophase I in meiosis is the most complicated prophase repetition that occurs in both plant and animal c...
meiosis (redirected fromProphase II) Thesaurus Medical Encyclopedia Related to Prophase II:Metaphase II meiosis top to bottom:In meiosis a parent cell replicates and recombines, divides once to create two daughter cells, then divides again creating four daughter cells, each of which has half the ...
meiosiswheatThe light microscope showed that zygotene and pachytene were completely suppressed in pollen mother cells of an asynaptic mutant of Triticum durum ; the chromosomes passed through a normal chromomeral leptotene condition and remained unpaired throughout prophase. The electron microscope ...
In this extended prophase, during the leptotene and zygotene substages (Fig. 3.2), chromosomes condense and then the maternal and paternal homologs align in homologous pairs (Figs. 3.1A and 3.2). Exactly how homology is recognized is one of the lingering mysteries of meiosis. The final ...
The meaning of PROPHASE is the initial stage of mitosis and of the mitotic division of meiosis characterized by the condensation of chromosomes consisting of two chromatids, disappearance of the nucleolus and nuclear membrane, and formation of mitotic sp
Terminalization The movement of chiasmata to the end of the bivalent arms, a process that may occur during late prophase I of meiosis. 发生在第一次减数分裂后期,染色体交叉向二价体染色体臂的末端移动的过程。 dictsearch.appspot.com 7. Impaired glucose tolerance(IGT) is the prophase of diabetes,...
Entry into meiosis can be defined both through a drastic change in gene expression and through initiation of the nuclear events of the MPI. MPI is relatively long and is typically divided into four successive stages: leptotene, zygotene, pachytene and diplotene, which are preceded by the prele...
the common features of these processes exemplified by meiosis in the domesticated silkworm,Bombyx mori. Electron micrographs showing the development of recombination nodules intochias- mata in Bombyx spermatocytes. Note the remnants of the synaptonemal complex. The...
23. Little is known about the control of the plant meiosis. The maizeelongatemutant, generates 2n female gametes as a result of the failure in female meiosis II, although the related gene has not been identified to date24. In theArabidopsis thaliana tam-1mutant, only one replacement of an ...