Restructuring A Genome

David then proceeded to draw the complete gene structure of the human eye he had selected. After a few minutes, his expression suddenly fell. The structure he had drawn was completely different from what he was seeing through the lens. 

It was as though he couldn't remember the pattern and was only just drawing the structure. Which meant that his few hours of learning was put to a waste just like that.

David froze in place for a while, his face very unsightly. 

Becoming a Genetist was even more difficult than he had thought. If the eye structure was this difficult to learn, what about the other structures. Like like the nose, the mouth and even the limbs? 

Who would even dare to become a Genetist under such harsh requirements. David sighed heavily. He had no choice but to try and learn the structure but this time, together with its pattern.