The Y chromosome can disappear over time in human males, which may introduce a number of health problems. While the exact trigger for such degeneration is unknown, environmental factors can play a ...

Genomic DNA is organized differently in prokaryotic and eukaryotic cells. The bacterium Escherichia coli contains a single circular chromosome and replication is initiated bi‐directionally from a ...

The research team discovered that this supposedly dormant X chromosome becomes activated later in life. This activation does not involve the entire chromosome but results in the expression of more ...

What is a prokaryotic cell? Prokaryotes are small, single-celled organisms with a simple structure. Unlike other cells, they don’t have a nucleus or other membrane-bound organelles. Instead, most ...

Males tend to only have one copy of the Y chromosome, so it does not have the opportunity to go through genetic recombination, or the "shuffling of genes that occurs in each generation which helps ...

Increased risk for autism appears to be linked to the Y chromosome, a Geisinger Health System study has found, offering a new explanation for the greater prevalence of autism in males. The results ...

Sex chromosomes are the genetic elements that define a person's biological sex. Learn about the XX and XY chromosomes, the sex determination system, and other chromosome combinations.

Prokaryotic cells do not have a nucleus. Instead, their genetic material, typically a single circular chromosome of DNA, is found in the nucleoid region of the cytoplasm. This region is not enclosed ...

Prokaryotic cells are simpler and smaller in size, while eukaryotic cells are more complex and larger. Understanding the differences between these two types of cells is crucial to understanding ...