A farmer was growing the peas seen here: round and yellow are dominant traits; green and wrinkled are recessive traits. The farmer's goal was to produce a crop of round, green peas. To do this, she introduced plants that bred true for green seeds (peas). Over time the gene pool was modified and the presence of yellow peas became non-existent. This change in the gene pool is a result of hybridization. In scientific terms, we could call this a method of A) gene flow. B) emigration. C) niche shift. D) genetic drift.