The largest chromosome pair
shows slight size differences in the three species (P.
This difference is further reflected by the fact that, when two chromosomes of a chromosome pair
differ only by carrying different sequences at a single locus, they will be interpreted as two different alleles if they do not characterise a monophyletic group, but as different characters (synapomorphies) if they do.
Each probe is labeled with varying proportions of 3 fluorescent dyes, which allows each chromosome pair
to be labeled by a light of unique spectral emission.
For each strain, a single chromosome pair
is depicted that is associated with three traits (i.
The fourth metacentric chromosome pair
is highlighted in Fig.
puelchana resulting from the presence of a single telocentric chromosome pair
In a separate report of karyotypic study in two races of this species, only one chromosome pair
was identified to have a satellite  which is discrepant with our observations.
22 Centromeric Chromosome Index Chromosome Pair
The chromosome pair
was considered as conserved (=) among the three species if arm lengths show no statistical significance.
In this study, FISH signals on one chromosome pair
were considerably stronger than those on the other pair (Fig.
During these studies, the scientists noticed that sister kinetochores - the protein structures that mark the site where a chromosome pair
is split during cell division - are farther apart in metaphase II eggs from older mice at 16 to 19 months of age compared to eggs from young mice of 6 to 14 weeks of age, a finding that drew their attention to explore reduced cohesion as a primary source for age-related aneuploidy.
Marking was observed in a single metacentric chromosome pair
(not individually identified on the karyotypes).