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Promiscuous females 'help species'
Former Member
Posts: 1,876,323 The Mix Honorary Guru
Promiscuous females could prevent their species becoming extinct, scientists have found.
According to research by the Universities of Exeter and Liverpool, females that have multiple mates reduce the risk of producing a brood of offspring without males.
The study, published in Current Biology, says an all-female brood could occur when all the 'male' Y chromosome sperm are killed before fertilisation, because of a sex-ratio distortion (SR) chromosome.
Scientists believe all-female broods will pass the chromosome on to their sons, which will in turn produce more female-only broods and eventually there will be no males and the population will die out.
http://uk.news.yahoo.com/21/20100225/thl-promiscuous-females-help-species-d831572.html
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According to research by the Universities of Exeter and Liverpool, females that have multiple mates reduce the risk of producing a brood of offspring without males.
The study, published in Current Biology, says an all-female brood could occur when all the 'male' Y chromosome sperm are killed before fertilisation, because of a sex-ratio distortion (SR) chromosome.
Scientists believe all-female broods will pass the chromosome on to their sons, which will in turn produce more female-only broods and eventually there will be no males and the population will die out.
http://uk.news.yahoo.com/21/20100225/thl-promiscuous-females-help-species-d831572.html
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Comments
There seems to have been a fairly even number of men and women on the planet for many years, although ratios vary from country to country. Even if this were true, it would take thousands of years for men to die out completely.
Their next project will presumably be to discover if my suspicion that the Pope is a Catholic has any truth to it.
I assume you have your own peer tested research project that contradicts what they say so that you can state with absolute confidence that they're "talking horseshit"?
I would say that the study of genetics and how chromosomes are passed to offspring and how gender ratios can be affected and thus lead to extinction is an important and worthy research topic. What would you have geneticists research?
This sent a shockwave through the community, which had previously considered such thinks to demonstrate the validity of God's commanded family, and they've been looking for why such a thing could happen - i.e. what the genetic benefits are.
Interestingly, there are some that believe a dearth of male hormones at a particular stage of pregnancy results in children that have an interesting ratio between the lengths of their index and ring fingers, and who grow up to want to have sex with lots of men - regardless of their of sex.
The emphasis of the article however is distracting. The human race is nowhere near being in danger of extinction, and the implied message appears to be 'sluts to thank for survival of mankind'. Non story really.
Hahahaha!!! Legend.
Xx
Then again, I feel the term 'promiscuous' does carry a lot more weight if applied to humans, don't you? I mean, who talks about promiscuous cats?
Cats are so slutty!
Quite a lot of people - have you never heard the expression "the morals of an alley cat?"
But no, it is a technical term, so it doesn't carry more weight. It's only if you use it as a pejorative that it has a moral weight.
Genetically speaking, women have a good number of offspring (10 or so seems about right), so the instinct is still there.
You're on your own with that opinion.
Haha yeah... I thought that as I posted it
Xx
If one individual is extremely dominant and gets all the girls it's logical for females to mate with somebody else to maintain genetic diversity. In a way, their offspring can be guaranteed to mate with strong sons/daughters of the dominant sire eventually and not get too inbred while at it.
For humans promiscuity doesn't really matter as today we have few offspring that take a long time to raise. There's plenty of diversity on offer because the gene pool is large, humans aren't exactly under the threat of becoming too inbred.
True.
On the other hand there's pressure to keep your partner around as the young are so time consuming. However many women have done so successfully while still having other men's children so yeah.
Interstingly, it has been observed in some species that the amount of effort the male expends raising the young is proportional to the amount of time they spent ni the presence of the female during the mating season - a biological counter to the promiscuous female - and analogous to the controlling partner not allowing their girlfriend to see other men?