state the theory of inheritance of acquired characters??
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The theory of inheritance of acquired characters states that modifications which the organism acquires in adaptation to the environments which it meets during its lifetime are automatically handed down to its descendants, and so become part of heredity.
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The theory of inheritance of acquired characters states that modifications which the organism acquires in adaptation to the environments which it meets during its lifetime are automatically handed down to its descendants, and so become part of heredity. His evolutionary ideas can be discussed in brief as follows:
1.life tend to increase the size of the organism:
New structures appear because of an “inner want” of the organism, i.e., the internal forces of life tend to increase continuously the size of an organism and its component parts.
2. Direct environmental effect over living organisms:
The organs of an animal became modified in appropriate fashion in direct response to a changing environment.
3. Use of disuse:
The various organs became greatly improved through use or reduced to vestiges through disuse.
4. Inheritance of acquired characteristics:
Such bodily modifications, in some manner, could be transferred and impressed on the germ cells to affect future generation. Thus, inheritance was viewed by Lamarck simply as the direct transmission of those superficial bodily changes that arose within the life time of the individual owing to use or disuse (Volpe, 1985).