How the works of Charles Darwin and Gregor Mendel contribute enormously to our understanding of the heritability of characteristics

Essay from the year 2011 in the subject Psychology - General, grade: 1,6, University College Cork, language: English, abstract: Charles Darwin (1809 - 1882)1 was the first person who explained an evolutionary theorie and the transmutations of species by natural selection and fitness. He stated that character traits are passing from one generation to another. But he didn't explain how this took place.
This is where Gregor Mendel (1822-1884)2 appears on the scene. He conducted research with pea plants and made genetical experiments. He was one of the major pioner handling with genetics. In the main Mendel figured out that two different types of genes do exist.
I will go more into deep under the chapters 2.2 and 3.2 'Theories'.
In the following these themes about genetics and how we -humans and every creature on this earthare receiving our characteristics, is what I want to single out during this essay.