Concept explainers
If you expose human tissue culture cells (for example, HeLa cells) to 3H-thymidine just as they enter S phase, then wash this material off the cells and let them go through a second S phase before looking at the chromosomes, how would you expect the 3H to be distributed over a pair of homologous chromosomes? (Ignore the effect recombination could have on this outcome.) Would the radioactivity be in (a) one chromatid of one homolog, (b) both chromatids of one homolog, (c) one chromatid each of both homologs, (d) both chromatids of both homologs, or (e) some other pattern? Choose the correct answer and explain your reasoning. (This problem extends the analysis begun in Solved Problem III.)
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Chapter 6 Solutions
EBK GENETICS: FROM GENES TO GENOMES
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- Which of the following descriptive terms does not describe Hydrodictyon? a. colonial b. nonmotile c. 1 large reticulated chloroplast in each cell d. all of these describe Hydrodictyonarrow_forwardWhich of the following does not apply to Chara? a. "stoneworts" b. isogamous c. calcified walls d. apical growth with an axis and branchesarrow_forwardtell us about one time when you went the extra mile when it would be acceptable to perform the bare minimum. why did you exert the extra effort and what was the outcome?arrow_forward
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