During development neurons are generated by sequential divisions of neural stem cells, or neuroblasts.
Accurate chromosome transmission is required both for the proliferative cell divisions that occur during mitosis and the sequential divisions that occur during meiosis to reduce genome copy number from two in diploid germline stem cells to one in haploid gametes.
In order to address these issues, this paper proposes a two-directional concurrent strategy of mode identification and sequential phase division for multimode and multiphase batch process monitoring with the uneven problem.
Telomeres cap linear chromosomes to maintain stability and shorten with successive rounds of DNA replication during sequential cell division.
The same pattern as described for the radicle meristem is observed: periclinal divisions for columella initials (red arrows), anticlinal divisions for peripheral root cap initials (white arrows), and three sequential periclinal divisions occur, giving rise to epidermis, exodermis, sclerenchyma, and endodermis (yellow arrows).
Moreover, in small lateral roots, three sequential periclinal divisions likely occur, giving rise to the epidermis, exodermis, sclerenchyma, and endodermis (Fig. 8, yellow arrows) but with no additional mesodermis layer that later differentiates into aerenchyma in all other root types.
Telomeres are nucleoprotein structures that cap the end of chromosomes and shorten with sequential cell divisions in normal aging.
Sequential cleavage divisions lead to the formation of a morula stage embryo wherein a fluid-filled cavity emerges called the blastocoel.
After fertilization, the mouse embryo undergoes a series of sequential cleavage divisions producing an eight-cell embryo, where blastomeres maximize their contact with one another in order to generate a compact sphere of cells.
