Between 1857 and 1864, Mendel shelled bushel upon bushel of peas, compulsively tabulating the results for each hybrid cross (“yellow seeds, green cotyledons, white flowers”). The results remained strikingly consistent. The small patch of land in the monastery garden produced an overwhelming volume of data to analyze—twenty-eight thousand plants, forty thousand flowers, and nearly four hundred thousand seeds. “It requires indeed some courage to undertake a labor of such far-reaching extent,” Mendel would write later. But courage is the wrong word here. More than courage, something else is
...more
