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Journey to the Microcosmos: Some Eggs Don't Need Sperm to Make Babies

10 minutes 13 seconds

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Still image from: Journey to the Microcosmos: Some Eggs Don't Need Sperm to Make Babies

The meeting of sperm and egg is an incredibly valuable one, allowing organisms to mix and match genes between individuals so that the population can better evolve and adapt. But not all sperm/egg pairings introduce variation. For example, some flatworms are hermaphroditic, and under certain conditions, they might fertilize their own eggs. Part of the "Journey to the Microcosmos" series.