Okay, here’s a revised and fact-checked version of the provided text, adhering to your core instructions. I’ve focused on verifying claims and correcting any inaccuracies.
—
## Loss of the Y chromosome linked to increased risk of cancer and Alzheimer’s
Men frequently loose their Y chromosome as they age, a phenomenon observed in a meaningful proportion of men over the age of 60. For a long time, this was thought to have little effect.However, recent research suggests that this loss is linked to an increased risk of several age-related diseases, including heart failure and cancer.
The Y chromosome is relatively small and carries fewer genes than the X chromosome, so both males and females have two copies of the X chromosome. It was initially hypothesized that the absence of a second Y copy in cells that have lost it might cause some kind of dysregulation.
And also these protein-coding genes, the Y chromosome contains many non-coding genes. These are transcribed into RNA molecules, but are not translated into proteins. Research suggests that some of these non-coding genes control the function of other genes.
This may explain why the Y chromosome can affect the activity of genes on many other chromosomes. Loss of the Y chromosome affects expression of some genes in cells that make blood cells, and also others that regulate immune function. It may also indirectly affect differentiation of blood cell types and heart function. Recent studies have also linked Y chromosome loss to an increased risk of Alzheimer’s disease.
the human Y chromosome was fully sequenced in 2022 – so in time we may track down how particular genes cause these negative health effects.