In 1876, Charles Darwin carried out an experiment concerning the height of corn plants. The seeds were from the same parents, but some seeds were produced from self-fertilized parents and some seeds were produced from cross-fertilized parents. Some seeds were planted in the same pot. Darwin hypothesized that cross-fertilization produced more robust and vigorous offspring.
pot: Which pot the corn was planted in (I/II/III/IV)cross: Height under cross-pollinated conditions (inches)self: Height under self-pollinated conditions (inches)I obtained the data from the agridat package. The original source is
Darwin C (1876). The Effect of Cross- and Self-fertilization in the Vegetable Kingdom. 2nd Ed. John Murray.