In humans, having freckles is dominant over not having freckles. Jodie and Brian are both hybrid (F) for freckles. They have four children. What is the chance that each child has freckles? (Remember that with each bith, the chance of
having a child with or without freckles starts over.
O all of them had freckles
O1out of 4
O2 out of 4
•3 out of 4

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.