DNA Lab (pg304)
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Today was our DNA Lab. Students worked in pairs trying to extract DNA from human cheeks cells. It’s tricky. Cheek cells are large and it’s hard to get very many of them, so collecting a visible amount of DNA is a delicate task. The basic steps included getting a sample of cheek cells, breaking the cell membranes using soap, unraveling the DNA using meat tenderizer, using alcohol to isolate the DNA, and then observing (see video above). You can find a copy of the lab posted below. All in all, it was a challenging yet productive day.
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to see state-specific standards (only available in the US).
Develop and use a model to describe why structural changes to genes (mutations) located on chromosomes may affect proteins and may result in harmful, beneficial, or neutral effects to the structure and function of the organism. Emphasis is on conceptual understanding that changes in genetic material may result in making different proteins. Assessment does not include specific changes at the molecular level, mechanisms for protein synthesis, or specific types of mutations.
Develop and use a model to describe why asexual reproduction results in offspring with identical genetic information and sexual reproduction results in offspring with genetic variation. Emphasis is on using models such as Punnett squares, diagrams, and simulations to describe the cause and effect relationship of gene transmission from parent(s) to offspring and resulting genetic variation.