0 relating to chromosomes (= the parts of the cell that carry genetic information):
Tests can determine whether your baby has any chromosomal abnormalities.
1 relating to chromosomes
This proposed model transfers murine findings to the human orthologous chromosomal region.
As such it was done without chromosomal replication : two haploids recombined their genomes and then separated as haploids again.
Point mutations in key regulatory genes, epigenetic changes, abnormal chromosome numbers and chromosomal rearrangements are frequently observed in tumour cells.
Indeed, such changes might be as important as the more widely studied genetic mutations and chromosomal aberrations that characterise tumour cells.
However, even this estimation may not be free from bias, especially when there are closely linked selected loci present in a short chromosomal region.
To date 24 chromosomal loci have been mapped, 11 chromosomal aberrations verified and 17 of the genes identified.
Many genetic studies are limited to big chromosomal segments and subsequent elaborated molecular genetic analyses.
These other chromosomal anomalies occur less frequently and often cause death in infancy.
