Cytogenetics is the study of chromosomes and chromosome abnormalities. The purpose of this Cytogenetics Gallery is to give you the opportunity to see what chromosomes look like under the microscope and how abnormalities of chromosomes are identified. Selecting topics from the left will display images and explanatory text. Clicking on highlighted words in the text will display definitions. Click on thumbnails to get the enlarged image (they may take some time to download due to the file size...). If you are unfamiliar with what a chromosome is, please read the brief description of a chromosome before continuing.