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6

In many cases cell division depends on the stage of development an organism is in. The rate of cell division is obviously much faster in a developing organism and from what I understand fully differentiated cells such as neuron and those in skeletal muscles don't divide (correct me if I'm wrong here). In early development totipotent cells (stem cells that ...


6

Mature, differentiated neurons do not divide (undergo mitosis), but apparently there is a small population of self-renewing neural stem cells in adults that can produce new neurons. Neurogenesis predominantly occurs in the subventricular and subgranular zones of the brain. Peripheral nerves can regenerate along its axon as long as the endoneurial tube and ...


5

I'm actually not sure myself. If I were to use something, I would go with "Mitos'd" and "Meios'd". However, you may not win over many fans, depending on the audience. If it's with students or maybe a professor, you could get away with shortening the processes. If it's in any formal setting, be as precise and descriptive as possible. It's not a lot of ...


5

If the question is about the one and only most important difference between mitosis and meiosis, then the answer "meiosis reduces ploidy" is probably correct. But if the list of important differences is open, it would be critical to add that mitosis generates identical cells (identical to each other and any ancestral cells, barring rare new mutations), while ...


2

According to all I've learned and heard, the only thing consistent about meiosis is that it reduces ploidy because homologous chromosomes are separated. (Not necessarily diploid to haploid - it can be polyploid as well, although odd ploidies usually seem to mess it up.) Mitosis on the other hand mainly serves to separate two copies of a genome into ...


2

It's a spatial constraint. As the DNA is replicated, the two resulting chromatids are kept stuck together by cohesin proteins. The DNA sequence that corresponds to the centromere then coalesces the kinetochore. It seems that the DNA-protein interactions at the centromeres creates a particular structure along the chromosome. Since the two chromatids have ...


1

I'm not sure about the first developmental stages but, given you already have hundreds of cells with slightly different physiology, the next developmental stages like dev. of neural tube happen through excretion of translation factors and growth factors in several cells. Each of those cells that are in a region where more than one excretion overlaps get a ...


1

As was pointed out by @jello differentiated neurons do not divide, instead new neurons are recruited into existing networks from undifferentiated cells. This process is called neurogenesis. A high level summary of adult neurogenesis: Neural progenitor cells differentiate into new neurons that have zero (or very few) synaptic connections, but are sensitive ...



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