lesson3 - 3 The Attack of the Killer Tadpoles Study Tip: I...

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3 The Attack of the Killer Tadpoles Study Tip: I hope I convinced you in the study tip for Lesson 2 that you should find a nice, quiet place in which to do your reading. But let’s continue that theme here. Reading, even when done in quiet surroundings, is not terribly active. I do a lot of reading and I sometimes find my mind wandering to other things. When I notice, I tend to go back and read it again with more focus. But I’m sure that sometimes I don’t notice. That may not be a big deal, but I would count the reading that needs to be done to prepare for an exam as a big deal. For “big deal” reading, I highly recommend that you add just a little bit of self-generated activity. Some of you haul out the highlighter. Okay, but that’s not much. A better activity would be to bring out some blank paper, outline the reading, then write a short synopsis of the main points that occur in each module. The valuable cognitive exercise here is the thinking that is required from you to decide what the critical points are. This little bit of extra time and effort can make all the difference when it comes time to remember certain concepts. Give it a try, maybe on your second pass through the reading. Key Terms and Concepts o Sensitive period o Developmental trajectory o Conversion o Continuous variable o Modulation o Categorical variable o Morph o Transactional approach to development o Flexible/plastic phenotypes o Genetic determinism o Acclimation o Environmental determinism o Developmental strategies o Heritability o Conditional strategies o Peer-review o Menarche Lesson 3 33
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We learned in Lesson 2 that development commences at the moment of conception, and that throughout life the individual’s genes, as engaged by its environment, influence the changes that occur in the phenotype. Each and every aspect of an organism is a joint product of its genes and its environment. Further, it is appropriate to inquire about the genesis of individual differences; these differences can be due to differences in genes or to differences in environments, or both. In this lesson we will continue to explore the mutual influences of genes and environments on individual development and we will begin the process of looking at development as an adaptation to ecological conditions. Developmental Pathways Lots of people who have grown up for a long time in the same house have a wall or door frame where mom or dad occasionally made marks to indicate the kids’ heights at certain ages. If you are lucky enough to have access to such a piece of nostalgia, you could probably get out a tape measure and plot your height according to your age. A plot of your height as a function of your age would be a good example of a developmental trajectory , a description of the phenotype over time. Trajectories also could be plotted for your vocabulary size, your introversion/extraversion score, blood pressure, or any other aspect of your phenotype. Developmental trajectories can take any number of different forms, but typical
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This note was uploaded on 05/27/2010 for the course BIOS 373 B02 taught by Professor Dr.danielleger during the Spring '10 term at UNL.

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lesson3 - 3 The Attack of the Killer Tadpoles Study Tip: I...

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