were any experiments done to prove La mark's theory of evolution?

Answer 1

Yes.
Lamarck based his theory on two observations, in his day considered to be generally true:
1. Use and disuse – Individuals lose characteristics they do not require (or use) and develop characteristics that are useful.
2. Inheritance of acquired traits – Individuals inherit the traits of their ancestors.

Here is an example of an experiment aimed to prove the theory:
In the 1920s, Harvard University researcher William McDougall, studied the abilities of rats to correctly solve mazes. He found that children of rats that had learned the maze were able to run it faster. The first rats would get it wrong 165 times before being able to run it perfectly each time,........
but after a few generations it was down to 20. McDougall attributed this to some sort of Lamarckian evolutionary process.

Answer 2

I read a book once that said that someone tried an experiment where he circumsized all the male mice in a colony for 20 generations to see if they would stop being born intact. The book continued, "Nobody knows why he bothered. If he had stopped to think a minute, he would have realized that Jewish boys have been being circumsized for considerably longer than 20 generations, and each Jewish baby is born intact." I don't remember the name of the book.

Answer 3

I'm not sure about 'experiments' just because his thought of evolution, EX) if you lifted weights and gain muscle mass, this is how your child will be grown up to be. It's logically impossible this way just because you come from your mothers and fathers DNA, not what they did later in life.

Answer 4

Experiments were done cutting off mice tails for many, many generations to see if they would eventually produce tailess mice. Of course, this never happened, so his theory was effectively thrown out.

Answer 5

I think genetic information rather refutes his " acquired characteristics " theories.

PS Max D, your are as deluded as McDougal was. Do you not realize that what he showed was genetic heritability of traits? Not full formed characteristics. Something from the 1920's, indeed!

Answer 6

Who is LaMark?