Seventh-grade student Ruby Waller leaned over the six-pack of green bok choy plants, and studiously inspected their spindly stems and yellow blossoms.
"Our tallest one is this one," she said, pointing to one that had collapsed like a vine. "It's 19 centimeters."
Wallers was talking to Patrick Edger, a post doctoral fellow at the University of California-Berkeley. The scientist responded with mock surprise, but genuine enthusiasm, at the revelation. "Wow! It really is!" he replied.
With financial help from the National Science Foundation, Edger is donating his time to teach the theory of Mendelian inheritance, based on Austrian scientist's Gregor Mendel's work, to four sections of seventh-graders at Jefferson City's Lewis and Clark Middle School in Jefferson City.