The traits are inherited through generations. This fact is based on the principles proposed by Mendel in 1865. However Mendel did not discovered this principles of inheritance by studying human beings then how his principles are applied in case of humans.

Explanation

Mendel performed his experiments on pea plants. He proposed three fundamental principles of inheritance. These principles eventually assisted clinicians in human disease research e.g. Archibold Garrod applied Mendels principles to his study of alkaptonuria. Today whether we talk about pea plants or human genetic traits that follow the rules of inheritance that Mendel proposed are called Mendelian principles.