A microdeletion of 1q21.1 involves the deletion of a small portion of the long (q) arm of chromosome 1, with around 1.35 million DNA base pairs or 1.35 megabases (Mb) that are missing in the q21.1 ...

Prokaryotic bacteria cell Bacteria are single-celled organisms that thrive in a wide variety of environments, from soil and water to the human gut to extreme habitats like hot springs. 19 Bacteria ...

Prokaryotic and Eukaryotic Cells: The cell is the basic unit of life and forms the building blocks of all living organisms.It was discovered by Robert Hooke In 1665.. Some cells have membrane ...

More information: Sarah Hoelzl et al, Aging promotes reactivation of the Barr body at distal chromosome regions, Nature Aging (2025). DOI: 10.1038/s43587-025-00856-8 Provided by Technical ...

The Y chromosome has seen significant changes over the course of human evolution. "In comparison to the X, the Y is tiny. There are only 45 genes on the Y chromosome, ...

Surprisingly, in several different cell types of the hippocampus, the X chromosome that was supposed to be silent instead expressed about 20 genes. Many of them play a role in brain development, as ...

Curiously, the researchers were able to deduce that there have been several bursts of growth in the chromosome’s existence over the last 11 million years. What drove those bursts is still a mystery.