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?

Tumors and other cancers can shed DNA into the bloodstream, distorting the ratios. Sometimes this can lead to alarming ...

Male cats have only one X chromosome, which they inherit from their mother. Since the mutation responsible for orange fur is ...

“This work is really important because the X chromosome has largely been excluded from genetic studies in the past,” said Amy Roberts, a molecular epidemiologist at King’s College London who was not ...

In particular, it explains that humans have one fewer chromosome pair in their cells than apes, due to a mutation found in chromosome number 2 that caused two chromosomes to fuse into one.

All men and only men have a Y chromosome. This biological fact allows us to trace back in time a direct, largely unchanged genetic line of inheritance from father to son. Every person, male or ...

Because centromeres vary in length, an individual chromosome can contain anywhere from hundreds to thousands of potential CENP-B boxes. Experiments show that CENP-B works as a dimer, so it may be ...

[44] Combining a limited karyotype with the more objective microarray data will allow for a clearer interpretation for any disease-causing chromosome abnormalities, if any, in the fetus undergoing ...

Once upon a time, the Y chromosome — responsible for determining male sex — was as robust as its X counterpart. Fast forward a few million years, and it’s now a slimmed-down version of its ...

Researchers at the Texas A&M College of Veterinary Medicine and Biomedical Sciences (VMBS) are helping uncover new information about the Y chromosome in horses, which will help owners identify ...