Zebrafish Test Cross
Shortly after students read the Zika virus article, an educational program, Project BioEYES, run through the University of Pennsylvania brought a weeklong zebrafish experiment to my classroom. In the zebrafish experiment, students crossed an albino and a wildtype zebrafish and observed embryo development.
Zebrafish Lab Discussion
On day one of the experiment, students were asked to hypothesize the genotype of the female zebrafish. To conclude the experiment, students were asked to write a lab discussion using the claim evidence reasoning framework. Claim evidence reasoning ties directly to the scientific method. In the first introduction to the framework, I related the two together for the students. With the framework the claim is the hypothesis. The evidence is observations made during the experiment and prior knowledge (for example a punnett square of a cross between a homozygous dominant female and recessive albino or a heterozygous female and a recessive albino) to help support or reject the hypothesis. Lastly, the reasoning shows how the evidence supports or refutes the hypothesis.
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Zebrafish image from http://izfs.org/resources/Pictures/slider-images/zebrafish_Novartis-AG2-2.jpg