Genetics

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Genetic pedigrees In these diagrams, people are represented by symbols, usually circles for female and squares for male, and the bottom line represents the children of the couple above. For simplicity, 4 offspring are shown in these examples. However, in practice the number, proportion and order of birth are likely to vary. Classroom Activity: Snack Tectonics Make the model Give each student about a square foot of wax paper and a large dollop of frosting. Instruct students to spread frosting into a layer about half a cm thick. Tell students that the frosting in this model represents the asthenosphere, the viscous layer on which Earth's plates ride. The plates in this model are represented by fruit roll up (oceanic crust which is thin and dense) and graham crackers (continental crust which is thick but less dense). Divergent plate boundary Instruct students to place the two squares of fruit roll up (oceanic plates) onto the frosting right next to each other. Press down slowly on the fruit roll ups (because they are dense and will sink a bit into the asthenosphere) as you slowly push them apart about half a cm.

Cell Size and Scale Some cells are visible to the unaided eye The smallest objects that the unaided human eye can see are about 0.1 mm long. That means that under the right conditions, you might be able to see an ameoba proteus, a human egg, and a paramecium without using magnification. DNA- The ins and outs! Watson and Crick's Paper Watson and Crick published a paper that described the complementary structure of DNA. This paper rocked the science world and illuminated the structure of DNA! Check out their Paper below! Punnett Squares Punnett Squares Punnett Squares Made Easy! Download "cheat sheet" Below is a sampling of Punnett Square problems that you will be expected to solve. The Gene School - General Information As of July 1, 2013 ThinkQuest has been discontinued. We would like to thank everyone for being a part of the ThinkQuest global community: Students - For your limitless creativity and innovation, which inspires us all. Teachers - For your passion in guiding students on their quest. Partners - For your unwavering support and evangelism.

Friends Have More DNA in Common Than Strangers People may unsuspectingly choose friends who have some DNA sequences in common with them, a new analysis finds. Researchers compared gene variations between nearly 2,000 people who were not biologically related, and found that friends had more gene variations in common than strangers. The study lends a possible scientific backing for the well-worn clichés, "We're just like family," or "Friends are the family you choose," the researchers said. NEWS: How The Sun Changes Your DNA

Interactive Animations This is our collection of interactive rollover flash animations. Click links or scroll down to view the available interactive animations.Check out our Earth Science Animations and Videos pages. Interactive Animations General Basin and Range Dynamic Planet- Earthquakes & Volcanoes Tectonics How Are Earthquakes Located- Walk Run Activity Earthquakes