In a new study, led by Charles Underwood from the Max Planck Institute for Plant Breeding Research (MPIPZ) in Cologne, Germany, scientists established a system to generate clonal sex cells in tomato plants and used them to design the genomes of offspring. The fertilization of a clonal egg from one parent by a clonal sperm from another parent led to plants containing the complete genetic information of both parents. The study is now published in Nature Genetics.