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inheritance of acquired characteristics. neo-Lamarckism. Lamarckism, a theory of evolution based on the principle that physical changes in organisms during their lifetime—such as greater development of an organ or a part through increased use—could be transmitted to their offspring.
- The Editors of Encyclopaedia Britannica
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What is inheritance of acquired characteristics?
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In the case of the French biologist Jean-Baptiste Lamarck, his name since the end of the nineteenth century has been tightly linked to the idea of the inheritance of acquired characters. This was indeed an idea that he endorsed, but he did not claim it as his own nor did he give it much thought.
- Richard W. Burkhardt
- 10.1534/genetics.113.151852
- 2013
- Genetics. 2013 Aug; 194(4): 793-805.
Lamarckism, also known as Lamarckian inheritance or neo-Lamarckism, [2] is the notion that an organism can pass on to its offspring physical characteristics that the parent organism acquired through use or disuse during its lifetime.
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The inheritance of such a characteristic means its reappearance in one or more individuals in the next or in succeeding generations. An example would be found in the supposed inheritance of a change brought about by the use and disuse of a special organ.
Inheritance of acquired characteristics, or inheritance of acquired characters is the once widely accepted idea that physiological modifications acquired by an organism can be inherited by the offspring.
Acquired characteristics, by definition, are characteristics that are gained by an organism after birth as a result of external influences or the organism's own activities which change its structure or function and cannot be inherited.
Abstract. Conflicting ideas surrounding the inheritance of acquired characteristics is not new; for nearly two centuries, debate surrounding the validity and mechanism behind inheritance of acquired characteristics was pioneered by Lamarck, Darwin, and Weismann.
