In this article we will discuss about the physical basis of heredity with theories investigated by a great number of workers, some of whose results are as follows: Encasement Theory: One of the older, but now abandoned, ideas was set forth in the preformation or encasement theory, which supposed that the germs of all future generation were encased one within [...]
The morphologic characteristics of chromosomes are best studied during metaphase and anaphase of cell division. The chromosome was supposed to be covered by a membranous Pellicle. Electron microscope studies later showed that there is no definite membranous pellicle surrounding the chromosomes. A matrix of some sort, possibly protein, lipid, may be present. Other structures present in the chromosome include the [...]
In this article we will discuss about the Mendel’s Principles. Also learn about its major limitations. Actually, the basic principles of heredity was formulated by Mendel in 1866 but under- standability and confirmation of Mendel's principles of heredity was clear to us after the rediscovery of Mendel's laws in 1900 by three geneticists : Correns, de Vries and Tschermark independently. [...]