(1) The modification of a genome by the external application of DNA from a cell of different genotype. (2) Conversion of normal eukaryotic cells to a cancer-like state of uncontrolled division. In eukaryotic cells, the word transformation is normally used only to describe a process that causes the cell to become malignant (cancerous). To avoid confusion, the introduction of a foreign gene that does not cause malignancy is referred to as transfec…


the transformation of one differentiated cell type into another….

P element

A Drosophila transposable element that has been used as a tool for insertion mutagenesis and for germline transformation….


The process by which spermatids mature into sperm cells. This occurs in the Sertoli cells and involves the transformation of the round spermatid into a spermatozoon with a head, mid-piece and tail….

List of Biology Words Starting with T

…iption Mediated Amplification (TMA) transcriptional profiling transcriptome transcytosis transducing particle transduction transfection transfer DNA transfer operon (tra) transfer RNA (tRNA) transform Transformant transformation transformer Transforming oncogene transgenic transgenic organism transient diploid transition transition mutation Transition-state intermediate translation translocase (EF-G) translocation transmem…


The rapid transformation from the larval to the adult form that occurs in the life cycle of many invertebrates and amphibians. Examples are the changes from a tadpole to a frog, or from a caterpillar to a butterfly….


The ability of a test to obtain results (within a given range) that vary in a manner directly proportional to changes in the concentration (amount) of the analyte in the sample, or by a well defined mathematical transformation….


a type of soil-inhabiting bacteria that is capable of introducing DNA from plasmids in the bacteria into the genome of plant cells. Often used in genetic transformation of plants….


The simultaneous transformation of two bacterial marker genes….

genomic island

A Genomic island(GI) is part of a genome that used to be mobile and is now fixed. A GI can code for many functions, can be involved in symbiosis or pathogenesis, and may help an organism’s adaptation. The same GI can occur in distantly related species as a result of various types of lateral gene transfer (transformation, conjugation, transduction). This can be determined by base composition analysis, as well as phylogeny estimations. Many…