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lethal gene |
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lethal gene [′lē·thəl ′jēn] (genetics) A gene mutation that causes premature death in heterozygotes if dominant, and in homozygotes if recessive. Also known as lethal mutation. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The discovery of a lethal gene in Holsteins may explain why pregnancy rates have dropped 20% in Holsteins over the last two decades. In one fruit fly line, the team inserted a three-part genetic time bomb: a lethal gene that disrupts signaling in cells, a switch controlling it that flips only in females, and a control for that switch that keeps it in its off state when the fly consumes the antibiotic tetracycline. |
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