Loss of Egg Yolk Genes in Mammals and the Origin of Lactation and Placentation (IMAGE)

PLOS

Loss of Egg Yolk Genes in Mammals and the Origin of Lactation and Placentation

Caption

The emergence of alternative nourishment resources (lactation and placentation) during mammalian evolution set the stage for mammals' progressive loss of egg yolk nourishment (as a consequence of the loss of egg yolk genes).

Credit

Image: Rasmus Kaessmann

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Attribution must be given to the photographer, Rasmus Kaessmann.

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