Flexi Says:
The three factors that Nobel laureate Sir Paul Nurse feels were the key to Mendel's success are: 1) he chose the material that he can understand and decided to work on simpler traits; 2) He recorded his data very accurately and precisely; 3) He postulated a theory or law to explain his observations and made it a basis to test the rest of his experiments. These were the characters that were associated more with physicists than geneticists.