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August Weismann’s 1892 theory that inheritance is transmitted through eggs and sperm provided the biological mechanism for natural selection. In this full-lengt...
Jun 11, 2018 · Weismann’s most influential contribution to biological thought was his theory of the continuity of the germ plasm, an explanation of heredity and development.
germ plasm. germ-plasm theory, concept of the physical basis of heredity expressed by the 19th-century biologist August Weismann ( q.v. ). According to his theory, germ plasm, which is independent from all other cells of the body (somatoplasm), is the essential element of germ cells (eggs and sperm) and is the hereditary material that is passed ...
- The Editors of Encyclopaedia Britannica
Weismann’s great contribution was the idea that germ-plasm — the name that he gave to the essential element of gametes, or eggs and sperm — carries the mat erial of heredity from one ...
- Jane Maienschein
- 2015
Jun 3, 2015 · Weismann's great contribution was the idea that germ-plasm — the name that he gave to the essential element of gametes, or eggs and sperm — carries the material of heredity from one...
August Weismann is famous for having argued against the inheritance of acquired characters. However, an analysis of his work indicates that Weismann always held that changes in external conditions, acting during development, were the necessary causes of variation in the hereditary material.
