Lexington Logo Black with White Outline

        In general biology, we’ve been working our way through our unit on genetics and heredity. Students have discovered patterns of inheritance by studying Duchenne Muscular Dystrophy, a genetic disease that affects mostly boys. Through this case study, we have also discovered how genetic diseases start through a mutation in the DNA and result in a faulty protein being made through transcription and translation. Most recently, students have been reading about the genetic engineering technologies (such as CRISPR) that may some day cure not only DMD but also other genetic disorders. Next up after this unit is our study on ecosystem interactions, the environment, and how humans are impacting both.

        To start off the semester in co-taught biology, we closed on our genetics unit by learning all we could about DNA. We discussed the history of its discovery, what it looks like and what it does as the “blueprint” for life. Then we used supplies that can be found at home (salt, soap, water, filter paper, rubbing alcohol and plastic baggies) to extract the DNA from a strawberry. We also played Codon Bingo to practice translating that genetic code into a useful protein, just like our cells do all the time. Next, we started discussing natural selection of populations and the history of life on Earth. Lots of questions have come up and we are all excited to be starting this new unit. We learned that the ancestors of whales walked on land, bird beaks may change shape over generations based on the food supply and elephants without tusks survive better than those that have tusks in areas with lots of poaching. All of these are examples of how species change over time. We will continue to study evolution through changes in population structures and determine how new species come to be.

        In applied science, students have been learning about the structure and function of the human body through anatomy and physiology units. So far, we have been through the integumentary (skin) system and skeletal system and just started the muscular system. The students have learned how to identify how much of a body has been burned through the Rule of 9s and put together a skeleton. For our muscles unit, we will have a guest lecture from Athletic Trainer Mr. Follmer. Next up will be the nervous system.