from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Either of the two daughter strands of a replicated chromosome that are joined by a single centromere and separate during cell division to become individual chromosomes.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Cell Biol.) one of two identical strands into which a chromosome splits during mitosis.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun genetics Either of the two
strandsof a chromosomethat separate during mitosis.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun one of two identical strands into which a chromosome splits during mitosis
Sorry, no etymologies found.
Some cellular mutations occuring in transformed cells may even be virus-induced, because in the early stages of transformation by papova viruses cells of primary cultures have frequent chromatid breaks (39).
In the spore, passage to opposite poles of the two centromeres of this newly created dicentric chromosome again produced a chromatid bridge that was again ruptured.
Entrance of a newly ruptured end of a chromosome into the zygote is followed by the chromatid type of breakage-fusion-bridge cycle throughout mitoses in the developing plant.
It was soon learned that the chromatid type of breakage-fusion-bridge cycle, initiated at a meiotic anaphase, will continue during the development of the pollen grain and the embryo sac.
When no telomere is present, attempts to replicate this uncapped end may be responsible for the apparent "fusions" of the replicated chromatids at the position of the previous break as well as for perpetuating the chromatid type of breakage-fusion-bridge cycle in successive mitoses.
The rupture occurred, in the first instance, at a meiotic anaphase in each parent, and the ruptured end then underwent the succession of mitotic anaphase breaks associated with the chromatid type of breakage-fusion-bridge cycle during the development of the male and female gametophytes -- the pollen grain and the embryo sac.
The terminalizing chromatid strands cannot pass through the nucleolus.
Significantly, this is only two mitoses removed from the initiation of the chromatid type of breakage-fusion-bridge cycle.
Therefore, these stocks were used to test if a presumed silent Dt element could be activated by the chromatid type of breakage-fusion-bridge cycle.
In the following anaphase, passage of the centromeres to opposite poles would produce two chromatid bridges.