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Some sperm cells swim faster and even poison their competition to climb to the top To stack the odds in their favor, some sperm cells play dirty tricks on their competition. It takes just one sperm to fertilize a woman’s egg and for each sperm that reaches the egg, there are millions that don’t. You probably knew that already, but here’s the thing: not all sperm cells are equal. Some have mutations in their DNA sequence that allow them to swim straighter, rather than in circles, and faster on average than their competition. What’s more, sperm cells can even employ gruesome tactics, such as poisoning their neighbors in order to enhance their odds of fertilizing the egg. ....
Algunos espermatozoides "envenenan" a sus competidores ecuavisa.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from ecuavisa.com Daily Mail and Mail on Sunday newspapers.
Espermatozoides "envenenan" a sus competidores para ganar sdpnoticias.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from sdpnoticias.com Daily Mail and Mail on Sunday newspapers.
In a Weird Twist, Sperm Have Been Caught Poisoning Other Sperm to Get Ahead in Mice 5 FEBRUARY 2021 When sperm race, it s for keeps. So it comes as little surprise that in some species, the competition over who reaches the egg first can get a little dirty. A variant in mice genes has been found to give sperm that possess it a clear advantage by poisoning its peers while they re still in development, robbing them of their ability to efficiently sniff their way towards the egg.
In a rather karmic twist, a race consisting only of would-be assassins would be a complete disaster, with researchers finding the genetic variant risks overdosing on its own killer cocktail unless the race is balanced out by its victims. ....
Study Finds Sperm ‘switch’ would allow men to turn their fertility on and off BERLIN, Germany The biological race between sperm to reach an egg is a fierce and competitive process. Now, researchers in Germany say they have discovered which protein gives sperm the winning edge. Their study finds a molecular “switch” in sperm could also allow men to turn their fertility on and off. Experiments on mice find the “winner” carries a set of toxic mutations that poison rival sperm. Researchers say a genetic factor called “t-haplotype” promotes the success of the sperm carrying it. They are also fueled by a protein called RAC1, the molecular switch that propels sperm forward. ....