who has written an engaging science book, Innate: How the Wiring of Our Brains Shapes Who We Are.
TCD genetics professor David McConnell reminded those at the book’s launch that the brain is a stunningly complicated structure. It is estimated that 86 billion neurons are formed before a child is born. Brain wiring proceeds through biochemistry, but critically this is buffeted by random events. “Though our personality stays the same, our behaviour does change with our experience,” he says. Neuroscientists now view the brain as far more plastic than once assumed. It shifts with experience, much like a muscle changes with exercise. Personality also helps us choose experiences that may reinforce our traits.
One reason is that females have two X chromosomes, whereas males have one. This means for girls genes on the X chromosome come as pairs. If one produces a faulty protein, there is a back-up copy. If there is a fault in a gene in a boy, the mutation will have a more severe impact, as there is no second gene.
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