Exempel på mitosis

• This nucleus gives rise at the first embryonic mitosis to 20 bivalents which coexist with 20 somatic chromosomes originating from the female pronucleus.

• Cells undergoing mitosis appeared spherical, covered with blebs and anchored to the substrate by retraction fibres.

• In this context, it is important to point out that the first divisions after karyogamy tend to deviate from the common pattern of mitosis.

• Cycling cytoplasmic factors that promote mitosis in the cultured 2-cell mouse embryo.

• These fragments appeared to be generated through the destruction of nuclei upon entry to mitosis.

• In the present study we have found that the sister blastomeres of tetraploid embryos reconstructed by fusion can also enter mitosis asynchronously.

• We conclude, therefore, that the replication-sensitive checkpoints that operate during mitosis are absent or inactive during meiosis.

• We cannot exclude the possibility that the spindle assembly checkpoint acts during the first mitosis.

• It would be more accurate to say that the centre was undergoing a kind of spatial mitosis.

• In normal human cells, the mutant is not present as an endogenous enzyme; the wild-type enzyme is only expressed before mitosis.

• When pronuclear heterokaryons enter the first mitosis, their nuclei condense and metaphase chromosomes are visualised.

• The other two smaller cells top of the figure have not started mitosis yet.

• We focused on the regulation of the first and the second mitosis.

• This mechanism is most clearly manifested during the first mitosis.

• During mitosis the endoplasmic reticulum is known to aggregate within the asters of the mitotic apparatus.