Who is Dr. Bill Ritchie? ----Dr. Bill Ritchie is a member of____________. What does Dr. Ritchie plan to do? -----Dr. Ritchie plans to ____________. How many Scottish Wildcats are left in the world today? --- It is estimated that__________. How could an immature egg from tissue recovered during spaying of domestic cats develop into a mature egg suitable for cloning? The development would be carried out_____________. Why do many animals in zoos fail to breed? Many animals in zoos fail to breed because_____________________and because __________________________.