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Unformatted text preview: 1-31Prof Tyrone HayesFrom Silent Spring to Silent Night: A Tale of Toads and MenEffect of atrazine on amphibians –Atrazine inhibited growth of the voice box in males.Atrazine on the testes converts testosterone into estrogen with aromatase. –causes chemical castrationUnanswered questions1.Are the hermaphrodites males with ovaries or females with testes?2.What happens when they become adults? 10 percent become fully female – capable of laying eggsTest pool “party”–successful pairings – controls out-competed the atrazine influenced onces.–Atrazine frogs dont have enough testosterone dont have enough to attract/perform with the female. Next question. Can they actually mate?–atrazine treated males fertility rate: 15 percent.–A slice of testes show a lack of sperm in their tubulesEffects in other species of frogs?Do they occur in the wild? Atrazine and other chemicals are found in farmland across US....
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This note was uploaded on 11/13/2011 for the course PB HLTH 116 taught by Professor Plotts during the Spring '11 term at Berkeley.
- Spring '11