The SDR gametes contain sister chromatids
from the centromere to the
It was possible to identify chromosomes with double B and/or G on the same chromatid
, as also B and/or G in both sister chromatids
This finding is in agreement with the conclusion that the counter-tension produced by the cleavage of the kleisin subunit of cohesin observed when all sister chromatids
are in mitosis (Jones, 2010) or all bivalents are in meiosis (Dumont et al.
Dynamic mosaicism occurs as a consequence of sister chromatid
exchange (SCE) of the ring chromosome during replication, resulting in several unbalanced chromosome outcomes.
Melanomas that have gains and losses in chromosomal fragments have most likely reached a crisis stage, with binding of chromatids
and uneven breakage during mitosis.
When Pds5 is removed and sister chromatids
become synapsed as a result, the segregation and recombination of homologs essential for genetic diversity fails.
Polyploidy might have occurred due to complete inhibition of spindle formation resulting in the failure of separation of chromatids
and confinement of chromosomes within one nucleus .
Each chromosome consists of two identical chromatids
joined at a centromere.
This could be partly the reason why the Kenya Institute of Education (KIE) report (1999) asserted that a considerable number of secondary school students in Kenya hold inadequate understanding of cell theory and the associated underlying concepts as mitosis, meiosis, chromosomes, and chromatids
, even after the conclusion of the instructional process.
Through a process of 'crossing over', the segments of non-sister chromatids
of a homologous pair of homologous dyads are exchanged.
The presence of multiduplicated genes is attributable to additional unequal crossover events affecting chromatids
that already contain duplicated genes.
Next, maternal sister chromatids
pair up with their paternal counterparts, usually exchanging stretches of DNA before the first cell division in meiosis separates the maternal and paternal chromosomes into two cells.
Inter- and intrapopulational variation was insignificant, and breaks of chromosomes or of individual chromatids
account for most of the observed cytogenetic aberrations.
We will use these in vitro replication systems together with both established and novel chromatin assembly systems to understand: a) how chromatin influences replication origin choice and timing, b) how nucleosomes on parental chromosomes are disrupted during replication and are distributed to daughter chromatids
, and c) how chromatin states and gene expression patterns are re-established after passage of the replication fork.
It keeps sister chromatids
together during cell division, and it allows normal transcription-the transmission of information from DNA to RNA.