Galls on Witch Hazel (IMAGE)
Caption
Most of the galls made by Hormaphis cornu aphids are green. But mutations in one gene trigger the development of a red gall instead.
Credit
David Stern
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Most of the galls made by Hormaphis cornu aphids are green. But mutations in one gene trigger the development of a red gall instead.
David Stern
Must use credit.
Licensed content