The Genetic Causes of Male Homosexuality

Why would a plant emit signals that only benefit neighboring plants, not the plant itself? The pea plant drying out on the edge of the row doesn't seem to have anything to gain by warning the others. There's also all kinds of examples of genetic traits that spread around within a community because they enhance the survivability of the whole community,. Not necessarily the individual. Bet you didn't think you were going to hear about the genetic causes of male homosexuality in a tomato podcast.