JedPerkins
Active Member
supersport said:"...the production of this enzyme is controlled by a switch that resides at the beta-galactosidase gene. The switch is off when lactose is absent but flips on when lactose is present. There are two key components of the switch, as protein called lac repressor, and the short stretch of DNA sequence near the beta-galactosidase gene to which the lac repressor protein can bind." pg.60
To me, "flipping a switch" infers triggering a mutation....no?...in fact he even calls it a genetic switch.
It is a genetic switch. It is NOT inducing a mutation. In fact, this isn't mutation at all. This has to do with regulating gene expression, the gene is not changing, just the degree to which the enzyme is expressed. People might be more inclined to take you seriously if you showed that you understood the systems you are talking about.
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