When hairless hamsters are mated with normal-haired hamsters, about 1/2 are hairless and 1/2 are normal. when hairless hamsters are crossed with each other, the ratio of normal-haired to hairless is 1: 2?

Select the correct answer from each drop-down menu. the lac operon in e.coli regulates genes that code for enzymes required for breakdown of lactose. the lac operon is operon that is activated in the presence of .