Question

Theory of germplasm was proposed in
A. 1792
B. 1825
C. 1868
D. 1892

Answer 1

Germ plasm is a biological concept developed in the 19th century. It states that heritable information is transmitted only by germ cells in the gonads, not by somatic cells.

Complete answer:
To answer this question, first, we need to know about the theory of germplasm. In this germ plasm theory, inherited behavior in a multicellular organism only occurs by means of the gametes like sperm cells and egg cells. Other body cells do not function as heredity agents August Weismann proposed the germ plasm theory in the 19th century, before the foundation of modern genetics.
Weismann gave the theory of germplasm, according to which organisms are made up of two types of cells, the somatic cells and germ cells. Characters are transmitted through generations by germ cells and not somatic cells.

Thus, the correct option is ‘D’. i.e. 1892.

Note: August Friedrich Leopold Weismann researched on how the traits of organisms grow and developed in several types of organisms, widely in insects and aquatic animals, in Germany in the early 20th century. Weismann reported the theory of the consistency of germ-plasm, the heredity theory. In the Germ-Plasm theory, Weismann gives a small history of inheritance theories before the germ-plasm theory.