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1、父親年齡大 孩子相貌丑壽命長
研究發(fā)現,父親年齡大的孩子相貌也較丑,但是這些丑孩子的壽命卻會比其他人長。
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Older fathers have uglier children, researchers have claimed after linking age to genetic mutations.
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The finding comes weeks after leading scientists reported children born to men over the age of 45 run a higher risk of having autism(孤獨癥)
2、 and psychiatric disorders.
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With age, sperm-producing cells do not copy a man's DNA as effectively, leading to genetic mutations.
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Martin Fielder, an anthropologist(人類學家) at Vienna University, told the Sunday Times: 'Every 16 years the mutation rate doubles. Other researchers found 25 mutatio
3、ns per sperm in a 20-year-old, but at age 40 it is 65 mutations. By 56, it doubles again.
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'The effect is very visible - someone born to a father of 22 is already 5-10 per cent more attractive than those with a 40-year-old father and the difference grows with the age gap.'
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In contrast, women
4、pass on a maximum of 15 mutations to their baby, regardless of age, according to the study published in the journal Nature.
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Surveying a group of six men and six women, researchers showed them each 4,018 photographs of 18-20-year-old men and 4,416 of women the same age, and asked to rate their at
5、tractiveness.
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Those with older fathers were consistently rated less attractive.
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However, the offspring of older men, though less attractive, are likely to outlive their peers with younger fathers, it is claimed.
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Professor Lee Smith, a geneticist at Edinburgh University, told the Sunday T
6、imes other research found such children have longer telomeres(染色體終端) - the caps on the end of chromosomes - which are associated with longer life.
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But the mounting research connecting parents' age with autism is cause for concern, experts warn.
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Autism is an umbrella term for a range of devel
7、opmental disorders that have a lifelong effect on someone's ability to interact socially and communicate.
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In the UK, around one in 100 adults is thought to be affected by autism, mostly men, caused by a combination of genetic and environmental factors.
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Researchers said men should be advised
8、about the potential problems in order to help their personal decision-making when it came to having fathering children at older ages.
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They warned that advancing paternal age posed a risk of 'numerous public health and societal problems'.
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Among well-known older dads are Simon Cowell, 54, whose son was born earlier this month, and comedian Frank Skinner whose first child was born in 2012 when he was 55.