Extra chromosomes, found in some fish, contain copied genes that don’t work but can still impact the organism. Research shows ...

When constructing bacterial artificial chromosomes (BACs), researchers must verify that they successfully inserted their gene of interest. Because these insertions are large, scientists perform their ...

A comprehensive genetic analysis of over 200,000 men has found that around one in 500 have an extra sex chromosome, with most of them unaware. That’s a much higher proportion than previously thought, ...

Trisomy is a genetic condition characterized by the presence of an extra chromosome. This means that the affected person has three copies of the 21st chromosome instead of two. The most common forms ...

Around one in 500 men could be carrying an extra X or Y chromosome -- most of them unaware -- putting them at increased risk of diseases such as type 2 diabetes, atherosclerosis and thrombosis, say ...

For Ashley Zambelli, a surprise diagnosis allowed her to have an even more special bond with her children. The Michigan-based mom, 23, recently found out she has Mosaic Down syndrome, a condition in ...

Humans carry 46 chromosomes. We get one from each parent, making 22 pairs of autosomal chromosomes, and one pair of sex chromosomes. Women usually carry two X (sex) chromosomes, while men typically ...

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London.View full profile Alfredo has a PhD in Astrophysics and a Master's in Quantum ...