Tryptophan Operon

Operon: When a single promoter controls a number of genes. If tryptophan is present in the environment, then E. coli bacteria don’t need to synthesize it, so transcription of the genes …

Genetic Code

If genes are segments of DNA and if a strand DNA is just a string of nucleotides, then the sequence of nucleotides must somehow dictate the sequence of amino …

Transcription

The process of formation of RNA from DNA template. The first step of information transfer from gene to protein is to produce an RNA strand whose base sequence matches …

Three-point testcross

is a cross of a trihybrid (triple heterozygote) to a triply recessive tester. This kind of cross, called a three-point testcross, is a commonly used format in linkage analysis. …