In addition to point and other small mutations targeting cancer genes, solid tumors often exhibit aneuploidy as well as multiple chromosomal rearrangements of large fragments of the genome.
The evidence for such introgression has often been discussed in the context of "selective sweep", which is a sort of natural selection for short chromosomal fragments following multiple recombination events resulting from natural crossings [3, 10, 22].
PCR and sequencing demonstrated that different fragments of the PAI can remain in the chromosome after excision, or chromosomal fragments can be excised together with the PAI.
Other repetitive elements, such as Pack-MULEs, have been shown to carry fragments of cellular genes from multiple chromosomal loci, some of which can be fused together to form novel open-reading frames that are expressed as chimeric transcripts (Jiang et al. 2004).
The microarray covered the 29 autosomes, the 2 sex chromosomes, and 25 randomly selected chromosomal fragments.
The multiple DNA bands in the SmaI-treated gDNA sample are chromosomal fragments, while the uncut circular form of pCTN1046 was retained in the well.
A large introgressed target chromosome fragment and the donor's chromosomal fragments remaining in the background can lead to undesirable traits in an improved line with a new genome.
A micronucleus is formed during cell division, expressing previously induced chromosomal damage, and contains chromosomal fragments and less frequently whole chromatids or chromosomes.
A comparison of the completely sequenced genome of an H aloquadratum walsbyi isolate (DSM 16790) with an environmental metagenome, both sampled from the same solar saltern in Spain, showed multiple chromosomal regions to be underrepresented in the environment, whereas contiguous regions of environmental fragments only partially matched regions of the sequenced genome.
The chromosome abnormalities could be observed as the gain and loss of whole chromosome arms, or just amplification and deletion of small chromosomal fragments.
