Chromosomal analysis is a laboratory technique used to examine an individual's chromosomes, which are structures that carry genetic information. This analysis helps identify chromosomal abnormalities, such as extra or missing chromosomes, which can lead to genetic disorders. It is often performed using a sample of blood or tissue, where cells are cultured and then stained to visualize the chromosomes under a microscope. The results of chromosomal analysis can provide valuable insights into various conditions, including Down syndrome, Turner syndrome, and Klinefelter syndrome. This information is crucial for diagnosis, treatment planning, and understanding the genetic risks for future generations.