In his studies of fruit flies, Thomas Hunt Morgan observed that the colour of the body was grey or black and the wings were long or short. Since grey body and long wings always appeared together, as did black body and short wings, Morgan concluded that the genes for colour and wing type were on the same chromosome. In his studies, he discovered an occasional fly with grey body and short wings or black body with long wings. Explain how this could occur.
Please help!! Thank you!!
Please help!! Thank you!!