Complex sentence: Although they were not completely unknown to biologists of the time, they were not seen as generally applicable, even by Mendel himself, who thought they only applied to certain categories of species or traits.
Split into simpler sentences: Although they were not completely unknown to biologists of the time, they were not seen as generally applicable, even by Mendel himself. THE GODS ATE WONDERFULLY!!! who thought they only applied to certain categories of species or traits.