Sperm Wars

February, 2007

did you cHOose hcr, or did SHe CHoose you? ¦Most females are sluts. Biologists don't use that word—too judgmental— but studies of various species over the past few decades have put to rest the notion that females are passive creatures who wait to be impreg­nated by an aggressive male. By practicing polyandry ("many males") females are able to get the best possible genes for their offspring. Using pater­nity studies, biologists have documented sperm competition in insects, birds and, mo...