The Y chromosome that makes men is poorly designed and degrading rapidly, meaning it's likely to disappear even while humans remain on the planet, an evolutionary geneticist and "thinker in residence" ...

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 [email protected] or click here to ...

Sex chromosomes are chromosomes, or packages of DNA, that are found inside the nucleus of all of your cells. There are two different kinds: X and Y, which determine whether you’re biologically male ...

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 carry our basic genetic material. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Your DNA blueprint (genome) doesn't exist as one ...

Sex is determined in a variety of different ways throughout the animal kingdom. In mammals, it is determined genetically, not by temperature, as it can be in reptiles. Typically, females have two X ...