Scientists in Canada and the United States recently discovered that heating can make the sex genes of algae dominant. This is the first time in the world to confirm that external influences can make sexual genes dominant. Volvox is a type of multicellular algae that normally grows in ponds. Males or females accumulate together for asexual propagation. When the summer warms, the ponds will dry up, and male and female Volvox will produce sperm cells and egg cells to reproduce sexually. Professor Biel Neckarku of the University of New Brunswick, Canada, and his colleagues believe that heat causes the sexual genes of Volvox to show dominance. In order to verify their point of view, they put a cultured algae culture dish in water and conducted a simulation test of the temperature in late summer. When the water temperature reaches 42.5 degrees Celsius for 10 minutes, the active oxygen produced by the algae is twice that of the unheated algae. When the active oxygen is doubled, the six genes of the Volvox are dominant, making the algae grow from asexual to sexual reproduction. The Canadian scientist's research was conducted jointly with his American counterparts. Their research was published in the "Journal of the Royal Academy of Sciences" recently published by the Royal Academy of Sciences in London.