The below mentioned article provides a short note on the Coupling and Repulsion Hypothesis of Gene. Bateson and Punnett in 1906, described a cross in sweat pea, where failure of gene pairs to assort independently was exhibited. Plants of a sweat pea variety having blue flower (BB) and long pollen (LL) were crossed with those of another variety having red [...]
In this article we will discuss about:- 1. Introduction to Linkage of Gene 2. Linkage Groups 3. Complete 4. Incomplete. Introduction to Linkage of Gene: Morgan (1910) noted similar behaviour in Drosophila melanogaster (Fig. 8.2) and recorded that coupling and repulsion are two aspects of a single phenomenon called linkage. Morgan was the first to relate linkage to the segregation [...]
The below mentioned article provides a short note on the Essential Properties of Gene. There are, however, certain essential properties of genes. As the genes control all characters transmitted from generation to generation, the gene must have the stability or permanency in the cell, principally in the nucleus. It implies that, it must be an essential component of all cells [...]