You would have thought Clegg and Clegg wouĺd do better writing the Biology of the Horsefly.Oh Sh1t!!!!!! You could be right there, and I apologise. If it's any excuse, my Biology A level was in 1972, and I haven't studied Clegg and Clegg's Biology of the Mammal ever since. Fabulous text, but it didn't have any fruit flies.
Sorry, but Thomas Hunt Morgan sounds like an imposter.
Wiki tells me Mendel's physics professor was Christian "neeeeeeeowwwww" Dopler.