A Chromosome Counting Technique Tracks Down Rare Trisomies (1 of 1) (VIDEO) American Association for the Advancement of Science (AAAS) This video is under embargo.

In humans and many other animals, specific chromosomes determine sex. But how did researchers discover these so-called sex chromosomes? Throughout the many observations that led to this conclusion ...

Certain equatorial-plate stages give a clear chromosome count of 10 chromosomes. It is possible that, with an extra number of chromosomes in an individual, the balance of the chromosome mass is upset ...

A study conducted by a research team at the Crick Institute identified important genes on the Y chromosome that regulate ...