Only 1,000 to 2,000 species of fruit flies exist worldwide. Nowhere in the world are fruit flies more taxonomically d...

Emil-Kunkin August 27 at 01:19AM

We are told in the passage that all of the species living in Hi are descended from one or two females. We are also told that there are some PWD fruit flies living in Hi. This means that they must be descended from those two initial females.