LifeCycles - Dr. Patrick OGrady Environmental Science,...

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Unformatted text preview: Dr. Patrick OGrady Environmental Science, Policy and Management 117a Hilgard Hall (510) 6420662; ogrady@berkeley.edu Oce hours by appointment, email frst Insect Growth and Life Cycles Reproduction Pattern Formation and Differentiation Larval Instars Change from Immature to Adult Morphology Eggs and Egg Laying Select oviposition site Open to predation while searching and egg laying Deposit eggs Mass egg laying (big bang): must ensure good location, there is no second chance; mass emergence makes it easy to find mates and overwhelm predators Selective egg laying: can better spread resource across many areas, hedge bets against chance events Great diversity of insect ovipositors HOX Genes: Arranged in a linear fashion on the chromosome, genes on the left control anterior structures, genes on the right control posterior structures. Exact same HOX genes, in the same order on the chromosome are present in humans, making insects an important developmental model system. We can use insects to better understand how development takes place in humans and other more complex animals. animals....
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LifeCycles - Dr. Patrick OGrady Environmental Science,...

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