This article throws light upon the following three main types of gene action. The types are: 1. Additive Gene Action 2. Dominance Gene Action 3. Epistasis. Type # 1. Additive Gene Action: When the genes act in such a way that substitution of one allele for another produces same plus or minus effect regardless of other gene (s) and the [...]
After reading this article we will learn about the Hardy-Weinberg equilibrium of gene. In a large random mating population, both gene and genotype frequencies remain constant from generation to generation, in absence of migration, mutation and selection. These properties of a population were first demonstrated by Hardy and Weinberg independently in 1908, and are generally known as Hardy-Weinberg law. If [...]
After reading this article you will learn about the meaning and system of plant tissue culture. Meaning of Tissue Culture: Tissue culture is a term, used to indicate the aseptic culture in vitro of a wide range of excised plant parts. It is used for both propagation and modification of genotypes (production of somaclonal variation and double haploids), biomass production [...]