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This is Scientific American's 60-Second Science. I'm Karen Hopkin. This'll just take a minute.
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For gentlemen fruit flies in search of a mate, beauty is in the legs of the beholder.
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Because male Drosophila have a sensory system that keeps them from courting flies of a different species.
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And it's located in their forelegs.
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The finding is in the journal Cell.
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When a boy fly approaches a potential partner, he taps her repeatedly on the side with those forelegs.
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But he's not just being a pest.
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Turns out he's checking her out at a molecular level.
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On his legs are sensory neurons equipped with a taste receptor called Gr32a.
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The receptor samples the waxy chemicals on the skin of his love interest.
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If the flavor is that of another species, Gr32a is turned on and the fly high-tails it out of there.
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When researchers removed the males' sensory appendages, or simply disarmed Gr32a, the airborne Romeos tried to mate with any female on six legs.
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They even went for species that were three times larger than themselves, a relationship that even an untrained human eye can see is out of balance.
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The system presumably keeps male flies from wasting their time pursuing females with whom coupling would prove less than fruitful.
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Thanks for the minute, for Scientific American's 60-Second Science. I'm Karen Hopkin.
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1 / 15
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显示原文 =This is Scientific American's 60-Second Science. I'm Karen Hopkin. This'll just take a minute.
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显示原文 =For gentlemen fruit flies in search of a mate, beauty is in the legs of the beholder.
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显示原文 =Because male Drosophila have a sensory system that keeps them from courting flies of a different species.
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4 / 15
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显示原文 =And it's located in their forelegs.
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显示原文 =The finding is in the journal Cell.
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显示原文 =When a boy fly approaches a potential partner, he taps her repeatedly on the side with those forelegs.
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7 / 15
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显示原文 =But he's not just being a pest.
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8 / 15
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显示原文 =Turns out he's checking her out at a molecular level.
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9 / 15
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显示原文 =On his legs are sensory neurons equipped with a taste receptor called Gr32a.
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10 / 15
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显示原文 =The receptor samples the waxy chemicals on the skin of his love interest.
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11 / 15
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显示原文 =If the flavor is that of another species, Gr32a is turned on and the fly high-tails it out of there.
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12 / 15
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显示原文 =When researchers removed the males' sensory appendages, or simply disarmed Gr32a, the airborne Romeos tried to mate with any female on six legs.
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13 / 15
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显示原文 =They even went for species that were three times larger than themselves, a relationship that even an untrained human eye can see is out of balance.
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14 / 15
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显示原文 =The system presumably keeps male flies from wasting their time pursuing females with whom coupling would prove less than fruitful.
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显示原文 =Thanks for the minute, for Scientific American's 60-Second Science. I'm Karen Hopkin.
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- 单句循环：关
- 单句循环：×3
- 单句循环：×5
- 单句循环：∞