In 7th grade the week-long zebrafish lab has begun! As part of a partnership with the Institute of Regenerative Medicine at Penn, the 7th graders learn the genetics of heredity through observing the development of zebrafish embryos.
On Day 1, Penn educator Tracy Nelson came to introduce the lab. Each group of students set up a mating tank of a wildtype female (dark body stripes, dark eyes) with an albino male (no body stripes, no pigment in eyes). Students then developed hypotheses about the phenotypes (physical appearance) of the offspring. On Day 2, students will extract the embryos that formed overnight (through external fertilization) and begin observing them to test their hypotheses. Zebrafish develop rapidly; larvae will hatch by Friday.