On Germinal Selection as a Source of Definite Variation

Hint: You can preview this book by clicking on "Preview" which is located under the cover of this book. About the author: August Friedrich Leopold Weismann (17 January 1834 – 5 November 1914) was a German evolutionary biologist. Ernst Mayr ranked him the second most notable evolutionary theorist of the 19th century, after Charles Darwin. Weismann became the Director of the Zoological Institute and the first Professor of Zoology at Freiburg.His main contribution was the germ plasm theory, at one time also known as Weismannism, according to which (in a multicellular organism) inheritance only takes place by means of the germ cells—the gametes such as egg cells and sperm cells. cells of the body—somatic cells—do not function as agents of heredity. The effect is one-way: germ cells produce somatic cells and are not affected by anything the somatic cells learn or therefore any ability an individual acquires during its life. Excerpt from: https://en.wikipedia.org/wiki/August_Weismann