[js1138]

The second is closer to the truth. Evolution describes change in the frequency and distribution of genes. Species are strong varieties. Many species are genetically capable of interbreeding, even though geography or superficial differences like coloration or song prevent interbreeding in the wild.

[Elsie]

Then just from WHERE did this large group come?

ALL things procede from just two (unless you're a cell or hermophodite worm) parents. Separate genders are supposedly an Evolutionary step up from the original Do-it-yourself-kit.