Scale is a proportion between two sets of measurements. For example, 1 centimeter on a map might represent 1 kilometer in actual distance. The diagram above on this page is a model of chromosomes,
DNA, and genes. Are all components of the model shown at the same scale? Explain your answer.

The hershey and chase experiments involved the preparation of two different types of radioactively labeled phage. which of the following best explains why two preparations were required? a. the bacteriophage used in the experiments was a t2 phage. b. it was necessary that each of the two phage components, dna and protein, be identifiable upon recovery at the end of the experiment. c. each scientist had his own method for labeling phage, so each conducted the same experiment using a different isotope. d. establishing the identity of the genetic material required observation of two phage generations.