Diseases, Conditions, Syndromes

COVID-19 mortality rates higher among men than women

A new review article from Beth Israel Deaconess Medical Center (BIDMC) shows people who are biologically male are dying from COVID-19 at a higher rate than people who are biologically female. In a review published in Frontiers ...

Diseases, Conditions, Syndromes

Q&A: Is DNA key to whether you get COVID-19?

The strength and health of one's immune system is one key indicator of susceptibility to contracting pathogens, including the novel coronavirus. However, new evidence that may suggest more men get coronavirus than women has ...

Medical research

New technique overcomes genetic cause of infertility

Scientists have created healthy offspring from genetically infertile male mice, offering a potential new approach to tackling a common genetic cause of human infertility.

Genetics

For keeping X chromosomes active, chromosome 19 marks the spot

After nearly 40 years of searching, Johns Hopkins researchers report they have identified a part of the human genome that appears to block an RNA responsible for keeping only a single X chromosome active when new female embryos ...

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Sex-determination system

A sex-determination system is a biological system that determines the development of sexual characteristics in an organism. Most sexual organisms have two sexes. In many cases, sex determination is genetic: males and females have different alleles or even different genes that specify their sexual morphology. In animals, this is often accompanied by chromosomal differences. In other cases, sex is determined by environmental variables (such as temperature) or social variables (the size of an organism relative to other members of its population). The details of some sex-determination systems are not yet fully understood.

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