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Activity
Howard Hughes Medical Institute

Mendelian Genetics, Probability, Pedigree, and Chi-Square Statistics

For Teachers 9th - 12th Standards
People with the sickle cell trait, but not sickle cell disease, find natural protection against malaria. Scholars consider various combinations of genotypes and environmental factors to determine if children might have sickle cell...
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Activity
Howard Hughes Medical Institute

Testing a Hypothesis

For Students 9th - 12th Standards
Are sickle cell disease and malaria related somehow? Scholars learn about both illnesses and the hypotheses that they are related. They discuss, view a video, and answer questions to demonstrate understanding. The resource includes an...
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Lesson Plan14:03
Howard Hughes Medical Institute

The Making of the Fittest: Natural Selection in Humans

For Teachers 8th - Higher Ed Standards
Sickle cell disease only occurs when both parents contribute the trait, and mostly in those of African descent. Where did it come from? How did it evolve? Tony Allison, a molecular biologist, noticed a connection between sickle cell and...
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Activity
Howard Hughes Medical Institute

How Do Fibers Form?

For Teachers 9th - 12th Standards
The proteins inside a cell determine the shape of the cell. While most red blood cells have a circular shape, those with sickle cell take the shape of a sickle. This change in shape causes multiple issues in the system. Scholars solve...
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Activity
Howard Hughes Medical Institute

Population Genetics, Selection, and Evolution

For Teachers 9th - 12th Standards
The Hardy-Weinberg principle states that alleles and genotypes remain constant in the absence of evolutionary influences. Scholars complete a simple hands-on activity applying the Hardy-Weinberg principle to sample data. They observe how...

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