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Australian biologist about :The incredible sex that is shrinking

Tuesday, November 5th, 2019

Australian biologist about :The incredible sex that is shrinking

Jennifer Marshall Graves, A australian biologist, is probably most commonly known for a dire prediction: the human being Y chromosome, which makes men male, could fade away within the next 5 million years. The number of genes on the Y has plummeted from more than 1,000 to roughly 50, a loss of more than 95 percent in the last 190 million years. The X chromosome, in comparison, appears strong at approximately 1,000 genes.

Media reaction was predictable, with overheated headlines proclaiming “Men on road to extinction.” But Graves, a biologist at Los Angeles Trobe University in Melbourne, records that 5 million years is really a very long time for a types such as ours, that is only 200,000 years of age. More to the point, the increased loss of the Y chromosome might maybe maybe not spell catastrophe. If the Y does disappear completely, we might well create a brand new apparatus for making males.

Researchers are uncovering that the mechanisms that organisms used to figure out intercourse have been in a remarkable state of flux.

Whenever one system is damaged, evolution appears to effortlessly show up with a brand new one. Wild wild wild Birds, seafood and snakes are finding variety means of making men and women. Sex chromosomes are generally swapped or lost. Also closely associated types can figure out intercourse in quite other ways, suggesting that the device is very flexible and evolving quickly.

Current studies among these animals that are different assisting researchers know very well what takes place when intercourse chromosomes shrink and disappear completely. (more…)