What are the selection conditions for Gemini and Apollo astronauts?

At that time, the selection conditions were that the height was no more than 1.83 meters, the age was under 35, and he had a degree in physics, biology or engineering and had flight experience as a jet test pilot. At that time, john young, who was only 32 years old, was1.75m tall and 50cm wide at the shoulder. One of 63 people selected from 200 applicants. After further inspection and screening, half of them were eliminated, leaving 32 people. Subsequently, after the inspection and evaluation of the Houston Manned Flight Center, nine people were selected, including two non-military and seven military. John young is one of them.