Bio 201 F07 True lect 6 v2

Bio 201 F07 True lect 6 v2 - PLEASE Turn cell phones off....

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PLEASE Turn cell phones off. NOW
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Today’s factoid • A research team in the UK recently demonstrated that bumblebees prefer to get nectar from warm flowers and prefer dark flowers possibly because they were more likely to be warmer • Google: “bumblebees prefer warm flowers” (National Geographic story)
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Wed. Oct. 3rd - 1st mid-term • On material through 9/28 • In Javits 100, 102 during class period – More details/rules to come • Practice exam questions will be posted on BB next week • We will announce times of TA review sessions next week
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Clarification • From lecture 4: – Drosophila larval salivary gland chromosomes • Differentiated cells • POST-MITOTIC - no longer undergoing divisions – Differentiated cells often have very specialized modifications of chromosomes and other components
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Darwin’s contributions • Main original contributions: – Natural selection – Sexual selection Tree of life
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Darwin’s contributions • Main original contributions: – Natural selection – Sexual selection – Tree of life – What about transformation of species ? • Idea had been around
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Jean-Baptiste Lamarck (1744-1829) • Put the idea of evolution on the map, well before Darwin • Less impact than Darwin, probably because he couldn’t/didn’t assemble nearly as much evidence as Darwin • Criticized heavily after Darwin mainly because of his proposed mechanism: inheritance of acquired traits – “use and “disuse”
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Lamarck Innate tendency to change in individuals Acquisition of new traits “use and disuse” Exaggeration Minimization/disappearance Inheritance of acquired traits
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“Gemmules”* Natural selection Darwin Inheritance of acquired characteristics Use and disuse Lamarck Mechanism of inheritance Mechanism of
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This note was uploaded on 04/09/2008 for the course BIOCHEMIST 361 taught by Professor Haltiwanger during the Fall '08 term at SUNY Stony Brook.

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Bio 201 F07 True lect 6 v2 - PLEASE Turn cell phones off....

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