Sex in intelligence and gentics

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Academic journal article Mankind Quarterly.Brothers of men convicted of sexual offences are five times more likely than average to commit the same types of crimes, scientists have found.Kanazawa lse.Behavior Genetics.Genes for cleverness are carried on the X chromosome and may be deactivated if they come from the father.Medical researchers at Melbourne's Murdoch Children's Research Institute have made a new discovery about how a baby's sex is determined -- it's not just about the X-Y chromosomes, but involves a 'regulator' that increases or decreases the activity of genes which decide if we become male or female.

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Certain plants, insects, crustaceans and fish possess the uncanny ability to change the sex of their offspring before they are born.

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Research on heritability of IQ implies, from the similarity of IQ in closely related persons, the proportion of variance of IQ among individuals in a population that is associated with genetic variation within that population.The study identified five new genes associated with sexual behavior.August 30, pm Updated August 30, pm.

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