The chromosomes tell the truth. XX or XY. If you completed high school and paid attention, XX or XY. If you know the difference, thank a teacher. You can cut off or glue, weld, stitch, strap or cover ...

Cytologists had been studying chromosome behavior since the late 19th century. Why did it take until 1956 to figure out the correct human chromosome number, thanks to Joe Hin Tjio and Albert Levan? Aa ...

Chromosomes are tightly coiled structures in each of your cells that contain DNA, the code for all life. DNA is organized in segments on chromosomes called genes. Humans typically have 46 chromosomes ...

The author who recently wrote that when it comes to chromosomes, it is XX or XY, is mistaken. It could be, in rare cases, XXY. Have something on your mind? Send to letters@adn.com or click here to ...