interbreeding

Duplicated and rearranged genes can account for some of this knottiness, Renner explains, as can interbreeding among these diverging plants.

But whether that interbreeding was critical to H. elevatus separating from H. pardalinus and becoming its own distinct species was a mystery.

They also can weaken wild Chinook fitness by interbreeding or disease, noted study author Misty MacDuffee, salmon biologist with the Raincoast Conservation Foundation, a science nonprofit.

And billions of people on Earth carry Denisovan DNA, inherited from interbreeding.

And yet, there’s no evidence of interbreeding in their genetics.