. Theory of pangenesis was given by


A. Darwin

B. Hugo de Vries

C. lamarck 

 D. Oparin

Best Answer

A

Sol.Pangenesis was Charles Darwin’s mechanism for heredity. He presented this ‘provisional hypothesis’ in his 1868 work The Variation of Animals and Plants Under D01-nestication and felt that it brought ‘together a multitude of facts which are at present left disconnected by any efficient cause’.The theory itself was deeply flawed and just plain wrong, yet it represents Darwin’s attempt to explain such perse phenomena as aravisms, the intermediate nature of hybrids (blending inheritance), Lamarckian use and disuse, and limb regeneration. Simply put, the theory holds that body cells shed ‘gemmules’ which collect in the reproductive organs prior to fertilization. Thus every cell in the body has a ‘vote’ in the constitution of the offspring. Atavisms arise due to the awaking of long-dormant gemmules while limbs regenerate due to the activation of gemmules from the missing limb which circulate in the main part of the body.

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