The following points highlight the top three types of multi-gene families. The types are: 1. Pseudo Genes 2. Selfish Genes 3. Split Gene - Exons and Introns. Multi-Gene Families: Type # 1. Pseudo Genes: Genes often exist which resemble other genes but their base sequence shows errors that make it impossible to contain biological information. These are pseudo genes which [...]
The below mentioned article provides a short note on the Homeotic Genes. Homeotic genes constitute an intricate regulatory network, in which one gene may activate or repress other genes Homeotic genes are involved in regulation of development through a predetermined pathway in which specific genes are turned on and off at particular times. Homeotic genes act in a transcriptional cascade, [...]
The following points highlight the five important types of DNA repair system. The types are: 1. Direct Repair 2. Excision Repair 3. Mismatch Repair 4. Double-Strand Break Repair 5. SOS Repair. Type # 1. Direct Repair: It involves the reversal of DNA damage. (i) Photo-Reactivation: Pyrimidine dinners (induced by UV rays) can be monomerised again by DNA photolyases in presence [...]