Question

Who gave the ‘theory of pangenesis’?
A.Lamarck
B.Wallace
C.Haeckel
D.Darwin

Answer 1

The theory of pangenesis was a theoretical system for heredity, in which he recommended that each portion of the body persistently radiated its own sort of little natural particles considered gemmules that totaled in the balls, contributing heritable data to the gametes.

Complete step by step answer: 1. Pangenesis was like thoughts set forth by Hippocrates, Democritus, and other pre-Darwinian researchers in suggesting that the entire of parental living beings partake in heredity. Some important points regarding the theory-
2. Darwin's pangenesis hypothesis endeavored to clarify the cycle of sexual proliferation, the legacy of attributes, and complex formative wonders, for example, cell recovery in a bound together structure.
3. Mechanistically, Darwin proposed pangenesis to happen through the exchange of natural particles which he named 'gemmules’.
4. Gemmules, which he added some of the time alluded to as platitudes, pangenes, granules, or germs, should be shed by the organs of the body and conveyed in the circulation system to the regenerative organs where they amassed in the germ cells or gametes.
5. Their aggregation was thought to happen by a type of a 'shared affinity.'
6. Each gemmule was supposed to be explicitly identified with a specific body part-as portrayed, they didn't contain data about the whole creature.
Hence, the correct option is (D) Darwin.

Additional information:
Lamarck proposed the theory of spontaneous generation.
Wallace- He was a naturalist and gave the theory of natural selection.
Haeckel- He gave the recapitulation theory. It states that ontogeny recapitulates ontogeny.

Note: The theory of pangenesis revolved around the term gemmules. This theory came much early and at that time genes were not discovered. The exchange of natural particles is done by pangenes or gemmules and hence the traits are passed onto the future generation.