studie mannen verliezen Y chromosomen als zij ouder worden

[dewanand]

onderwerp:
studie mannen verliezen Y chromosomen als zij ouder worden

analyse

1) dus hierom gaan mannen jonger dood en vaker door hartklachten

2) Kan ook verklaren waarom oudere mannen opeens Tgirls worden zoals mij en bottom homootjes , ze veranderen in kleine hete meiden en laten zich dan flink uitnaaien vaak door normale bi of hetero top mannen

3) De natuur heeft zelfcorrigerende mechanismen, ongelooflijk zeg JOnge meiden willen de grootste, sterkste en potentste, hetero hardneuk LULLEN voelen en erdoor bevrucht worden voor sterk en gezond nageslacht. PUUR Natuur he



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https://www.science.org/content/arti...g-their-hearts



NewsBiology

Men lose Y chromosomes as they age. It may be harming their hearts
Study in mice is first to directly test health effects of losing male chromosome

14 Jul 20222:00 PMByMitch Leslie

As men get older, they don’t just lose their hair, muscle tone, and knee cartilage. They also start to lose Y chromosomes from their cells. Scientists have linked this vanishing to a long list of diseases and a higher risk of death, but the evidence has been circumstantial. Now, researchers report that when they removed the Y chromosome from male mice, the animals died earlier than their Y-carrying counterparts, likely because their hearts became stiffer.

“This is the best evidence to date” that losing the Y chromosome is detrimental to health, says John Perry, a human geneticist at the University of Cambridge. Perry led one of the biggest studies on the frequency of Y chromosome loss in men, but wasn’t connected to the new research.

Despite its macho reputation, the Y chromosome is a pipsqueak, carrying a mere 71 genes—less than one-tenth as many as the X chromosome. That may be why the chromosome sometimes doesn’t get passed on when a cell divides. Analyzing blood samples is the easiest way to detect loss of Y, and researchers have found the chromosome is missing from at least some white blood cells in about 40% of 70-year-olds and 57% of 93-year-olds. In some older men, more than 80% of the cells can be short a Y chromosome.

Cells can survive and reproduce without a Y, but men lacking the chromosome in some of their cells are more likely to suffer from heart disease, cancer, Alzheimer’s disease, and other aging-related ailments. Moreover, the condition could be a reason why men die on average about 5 years earlier than women in the United States, says molecular biologist Kenneth Walsh of the University of Virginia.





https://www.science.org/content/arti...g-their-hearts

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