Calcium aids chromosome condensation prior to cell division

Osaka University-led Japanese research reveals role for calcium ions in chromosome condensation during mitosis; high-resolution imaging of living cells reveals compact, globular chromosomes in the presence of calcium that ...

Hushing the X chromosome

Early in the development of female embryos, a crucial event occurs in all cells: An X chromosome is silenced. Whereas males have only one X chromosome, females have two—which means they can have twice as many proteins generated ...

Scientists untangle Barr body of inactive X chromosome

Scientists at UMass Medical School, the Institut Curie in Paris and Stanford University, have taken a detailed look inside the small, densely packed structure of the inactive X chromosome found in female mammals called the ...

Scientists delve into 'black box' of DNA research

Scientists at Florida State University, Baylor College of Medicine and the Broad Institute of Harvard and MIT have broken ground in a little-understood area of human genetics.

Scientists identify structure of crucial enzyme in cell division

UT Southwestern Medical Center researchers have determined the atomic structure of an enzyme that plays an essential role in cell division, the fundamental process that occurs countless times daily in many life forms on Earth.

DNA which only females have

In many animal species, the chromosomes differ between the sexes. The male has a Y chromosome. In some animals, however, for example birds, it is the other way round. In birds, the females have their own sex chromosome, the ...

Physical reason for chromosome shape discovered

Researchers from the Universitat Autònoma de Barcelona have determined why metaphase chromosomes have their characteristic elongated cylindrical shape. The results show that this morphology is related to the chromosome's ...

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