agricultural biotechnology

  Introduction Every living organism carries a unique genetic blueprint known as DNA (Deoxyribonucleic Acid) , which stores the hereditary information responsible for growth, development, and biological characteristics. Except for identical twins, no two individuals have exactly the same DNA sequence. This remarkable uniqueness forms the foundation of DNA fingerprinting , one of the most significant breakthroughs in modern molecular biology and forensic science . DNA fingerprinting, also known as DNA profiling or genetic fingerprinting , is a laboratory technique used to identify individuals by analyzing specific regions of their DNA that vary from person to person. Rather than examining the entire genome, scientists focus on highly variable DNA markers that create a distinctive genetic profile for each individual. This profile can be compared with DNA obtained from biological samples such as blood, saliva, hair roots, semen, skin cells, bones, plant tissues, or seeds to determine...

  Introduction Southern blotting is one of the most important molecular biology techniques used for the detection and analysis of specific DNA sequences within a complex DNA sample. Developed by British molecular biologist Edwin Southern in 1975, this technique revolutionized genetic research by allowing scientists to identify particular genes, DNA fragments, and genetic variations. The method involves separating DNA fragments based on size through gel electrophoresis , transferring them onto a membrane, and detecting the target sequence using a labeled complementary DNA probe . Even with the advancement of PCR , qPCR , and next-generation sequencing (NGS), Southern blotting remains a valuable technique because it provides information about DNA size, copy number, genome organization , and structural variations . What is Southern Blotting? Southern blotting is a molecular hybridization technique used to detect a specific DNA sequence in a mixture of DNA molecules. The process...