In this article we will discuss about:- 1. Introduction to the Kinds of Genes in Eukaryotes 2. Repetitive DNA Sequences 3. Transcription of DNA and RNA in Eukaryotes 4. Mitochondrial DNA and RNA. Introduction to the Kinds of Genes in Eukaryotes: The principle of "one gene, one protein" does not apply to all genes. There are genes which do not [...]
In this article we will discuss about the linkage and crossing over of genes. In Mendelian experiment the common sweet peas with two or more “elements” (now called genes) are considered heterozygous. In a hybrid, the segregation of any one is completely independent of the rest. That means, all the genes are distributed to the gametes at random. Mendel considered [...]
In this article we will discuss about the crossing over of genes, explained with the help of suitable diagrams. The genes remain in linear order along the length of the chromosome and linkage is the physical relationship between the genes. During meiosis a physical crossover between gene pairs (Hi homologous chromosomes occur. According to Jonssen's crossover Theory (1909) a cytologically [...]