Chromosomal anomaly refers to changes or abnormalities in the number, structure or arrangement of chromosomes. This can occur due to errors during cell division, exposure to environmental factors or mutations in genes that regulate DNA repair. Synonyms for chromosomal anomaly include chromosomal aberration, chromosome abnormality, genetic disorder, chromosomal variation, and chromosomal irregularity. These terms are often used to describe conditions such as Down syndrome, Turner syndrome, and Klinefelter syndrome, which result from an abnormal number of chromosomes. Chromosomal anomalies can also cause infertility, cognitive disabilities, and developmental abnormalities, making it essential to diagnose and manage them early.