Tag: gene
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The Genetics of Frizzle Frazzle Chicks
Frizzle feathers in chickens is the result of a dominant allele. Practice crosses between different types of chickens, by completing Punnett squares.
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Genetics Practice – Roan Cows with Horns
Practice genetics with cows! Cows can be horned (hh) or hornless. They can also be red, white, or roan colored.
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Gene Regulation in Prokaryotes – Lac Operon
Students examine graphics showing the lac-operon and the trp operon. The graphics illustrate how the operons are turned on and off.
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Investigation: Sticklebacks
This investigation was modified from the HHMI Stickleback Modeling activity where students examine two different forms of the the stickleback fish. One form has spines and bony armor and is found in the ocean. The other has less armor and is missing its pelvic girdle, and is found in fresh water lakes. The activity has…
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Case Study: How Do Tibetans Survive High Altitudes
Based on the Berkeley website: Understanding Evolution, this version focuses on the how the body maintains homeostasis at high altitudes. This involves increased production of red blood cells to improve oxygen supplies to tissues. Tibetan populations have adapted to high altitudes by producing fewer red blood cells which improves fetal mortality rates. Case looks…
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Investigation: Gene Switches in Stickleback Fish
This activity was modified from HHMI’s “Modeling the Regulatory Switches of the Pitx1 Gene in Stickleback Fish” The activity is presented as a type of investigation or case study where students examine regulatory switches and was a short film that describes the role of the Pitx1 gene in the development of spines. Students can work…
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DNA, Proteins, and Sickle Cell
In this activity, students use a codon chart to compare the DNA sequence of HbA (normal hemoglobin) to HbS (sickle cell). The DNA differs in a single base, where the codon for normal hemoglobin codes for glutamine, and the mutant form codes for valine.
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Meiosis Case: SRY not SRY
Students are given a scenario about a female athlete who was stripped of her medal when it was discovered that her cells contain a Y chromosome.