The good news is two branches of rodents have already lost their Y chromosome and have lived to tell the tale. A new paper in Proceedings of the National Academy of Science shows how the spiny rat has evolved a new male-determining gene. How the Y chromosome determines human sex. In humans, as in other mammals, females have two X chromosomes But the human Y chromosome is degenerating and may disappear in a few million years, leading to our extinction unless we evolve a new sex gene. The good news is two branches of rodents have already lost their Y chromosome and have lived to tell the tale. A 2022 paper in Proceedings of the National Academy of Science shows how the spiny rat has Men are slowly losing their Y chromosome, but a discovery in spiny rats brings hope for humanity. The sex of human and other mammal babies is decided by a male-determining gene on the Y chromosome Over time, the Y chromosome has a limited gene repertoire, shrivelling and degenerating slowly. However, this has not always been the case. 166 million years ago, the Y chromosome was as gene-rich In humans, as in other mammals, females have two X chromosomes and males have a single X and a puny little chromosome called Y. The names have nothing to do with their shape; the X stood for The sex of human and other mammal babies is decided by a male-determining gene on the Y chromosome. But the human Y chromosome is degenerating and may disappear in a few million years, leading to our extinction unless we evolve a new sex gene. The good news is two branches of rodents have already lost their Y chromosome and have lived to tell 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 What's more, the Y chromosome has

degenerated rapidly, leaving females with two perfectly normal X chromosomes, but males with an X and a shrivelled Y. If the same rate of degeneration continues A new study using male mice genetically engineered to lose their Y chromosomes provides insight. The paper, published on Thursday in the journal Science, found that when the Y chromosome was gone X and Y chromosome. Nathan Devery/ShutterstockThe sex of human and other mammal babies is decided by a male-determining gene on the Y chromosome. But the human Y chromosome is degenerating and may The Y chromosome, which plays a crucial role in determining male sex in humans, is shrinking. Over the past 300 million years, it has lost 1,393 of its original 1,438 genes, with only 45 genes The Y chromosome began losing respect in the late 1950s. Men with their Y-related genes will have slightly different cells than women, who have two X chromosomes, and that goes above and The scientists also looked at the effects of Y chromosome loss in human men. They conducted three analyses of data compiled from the UK Biobank, a massive biomedical database, and found that Y chromosome loss was associated with cardiovascular disease and heart failure. As chromosome loss increased, the scientists found, so did the risk of death. Read more: Men are slowly losing their Y chromosome, but a new sex gene discovery in spiny rats brings hope for humanity Sequencing Y was a nightmare The first draft of the human genome was The Y chromosomes, which have been the male-determining gene, have been degenerating and are likely to disappear in some million years. But would the vanishment of the Y chromosomes lead to the extinction of men? Maybe not, because scientists have observed that the two branches of rodents have survived after losing their Y chromosomes. In a paper published in Proceedings of the National The Y chromosome, critical for male sex determination, has been losing genetic material and might vanish in the future. Studies in some

rodents indicate that species can survive by evolving new The Y chromosome is one of the two sex chromosomes in humans — the other is the X chromosome. Humans and most other mammals have two sex chromosomes — X and Y — that in combination determine the sex of an individual. Females have two X chromosomes in their cells, while males have one X and one Y. Men are slowly losing their Y chromosome, but a discovery in spiny rats brings hope for humanity. December 6 2022, by Jenny Graves. The sex of human and other mammal babies is decided by a male Men are slowly losing their Y chromosome, but a discovery in spiny rats brings hope for humanity. Dec 6, 2022. The most comprehensive sci-tech news coverage on the web. Newsletters. The sex of human and other mammal babies hinges on a gene found on the Y chromosome, which plays a key role in developing males. However, the Y chromosome is slowly deteriorating and could The good news is that two branches of rodents have already lost their Y chromosome and survived. A 2022 study published in peer review journal 'Proceedings of the National Academy of Science' reveals that the spiny rat has successfully evolved a new male-determining gene, offering hope for humanity's future. In blood, loss of the Y chromosome in some cells is the most commonly observed mosaicism, but there are countless other examples. In women, some blood cells lose one X chromosome. Other subsets of Role of the Y chromosome The Y chromosome is one of the two sex chromosomes that determine the sex of humans and other mammals; the other, of course, is the X chromosome. Males have one X and one Y chromosome, while females have two X chromosomes in their cells. The Y chromosome contains about 55 genes. The X chromosome contains about 900 genes.