For the beta-galactosidase assay, as controls, you plate bacteria known to be able to digest lactose (Lac+) and bacteria known to be unable to digest lactose (Lac-) on LB + X-Gal plates. After an overnight incubation at 37C you expect to see growth with blue colonies on the plate
Gene Interactions
When the expression of a single trait is influenced by two or more different non-allelic genes, it is termed as genetic interaction. According to Mendel's law of inheritance, each gene functions in its own way and does not depend on the function of another gene, i.e., a single gene controls each of seven characteristics considered, but the complex contribution of many different genes determine many traits of an organism.
Gene Expression
Gene expression is a process by which the instructions present in deoxyribonucleic acid (DNA) are converted into useful molecules such as proteins, and functional messenger ribonucleic (mRNA) molecules in the case of non-protein-coding genes.
For the beta-galactosidase assay, as controls, you plate bacteria known to be able to digest lactose (Lac+) and bacteria known to be unable to digest lactose (Lac-) on LB + X-Gal plates.
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