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, [...]
Genes that confer the ability to convert cells to a tumourigenic state are called oncogenes. Cancer cells are characterised by immortalization, transformation and metastasis. Oncogenes induce uncontrolled cell growth resulting in tumour, so it can be anticipated that the products of these genes would act by stimulating cell division in some manner. Now it is clear that the products of [...]