The following points highlight the six main types of genes. The types are: 1. Complementary Genes 2. Duplicate Genes 3. Polymeric Genes 4. Modifying Genes 5. Lethal Genes 6. Moveable Genes. Type # 1. Complementary Genes: Bateson and Punnett crossed two different white flowered varieties of sweet pea and obtained an F1 progeny of red flowered plants. On self-pollination the [...]
The below mentioned article provides notes on quantitative variation. The classical experiments in Mendelian inheritance demonstrated transmission of obviously well-marked, distinct pairs of contrasting characters (tall vs. dwarf; yellow vs. green cotyledons, etc.). Moreover, the two alternative expressions of a phenotype were controlled by a single gene which strictly obeyed the rules of dominance to produce visible qualitative differences between [...]
In this article we will discuss about the inheritance of kernel colour in wheat. Nilsson-Ehle performed many crosses between varieties of wheat having red seeds and those having white seeds. In all crosses except one the F2 generation gave a ratio of 3 red to 1 white. In the one exceptional cross he used a very old red variety from [...]