Sentences with phrase «cell division happens»
This error in cell division happens at conception and its causes are still unknown.
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This happens when environmental agents damage DNA, or when mistakes occur when a cell copies its DNA prior to cell division, as orchestrated by God.»
Researchers were able to date the age of each new clone back to the parent tree by comparing the everyday mutations that happen with known regularity during the process of cell division.
His hunch is that the mechanisms controlling cell division have gone wrong — somewhat like what happens in cancer — and that plaques and tangles are the result.
«While we don't yet know why this happens, it's so remarkable that it tells us something fundamental about telomeres and cell division.
This distinction is especially important when a cell copies its genetic material, which happens just prior to cell division.
The study, which was led by postdoc Gregor Pilz and PhD student Sara Bottes, used in vivo 2 - photon imaging and genetic labeling of neural stem cells in order to observe stem cell divisions as they happened, and to follow the maturation of new nerve cells for up to two months.
«We want to reconstruct the elemental building plan of animals, tracking each cell from very early development until late stages, so that we know everything that has happened in terms of cell movement and cell division,» Keller says.
The scientists involved with this study were able to demonstrate that translocations can occur within hours of DNA breaks and that their formation is independent of when the breaks happen during the cell division cycle.
Baumann suspects that it could happen over two rounds of replication or if two sex cells combine forces before the division process starts.
The group found that for species of snails that are dominantly sinistral, early embryo cell division is a mirror image of what happens in the dominantly dextral Lymnaea stagnalis.
They speculate that because the process of reprogramming increases the number of cell divisions that take place (as compared to what happens in adult skin cells), there are more opportunities for the cell cycle checkpoints to correct for the chromosomal breakage.
And while we learn some seriously concerning details about what's happening to males worldwide - a Danish study in 1992 demonstrated that sperm counts in healthy men had dropped by more than half in 50 years - with rapid cell division in sperm making them vulnerable to chemicals in the environment, especially endocrine disruptors, there is hope at hand!