0 either of the parts into which a chromosome divides during mitosis (= when one cell divides into two identical cells)
We consider this unsuccessful development of reconstituted eggs to be due mainly to abnormal spindle formation and/or unequal distribution of chromatids, as described above.
One of the spores carries a mutant allele with a structure showing that a duplication in one chromatid had been transferred to a homologous chromatid.
Chromatids carrying the smaller allele are represented in black, and chromatids carrying the larger allele are represented in grey.
There were no differences in the distribution of the different types of chromosomal and chromatid aberrations between the two storage groups.
Two molecular processes generating variability have been proposed : replication slippage due to slipped-strand mispairing and unequal recombination between homologous chromosomes (or chromatids).
Separate chromatids can also be resolved in the long arms of these chromosomes (arrowheads).
In each cell analysed, the number of chromosomes and/or chromatids was counted at x1250 magnification to provide data for calculating aneuploidy.
Fourteen hyperhaploidies were found, seven involving additional single chromatids.
