Course

Genetics

Study Pack

Set 8 Gene Expression The Flow Of Information From Dna To Rna To Protein

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Question 1

(Multiple Choice)

Free
If a man shows the premutation allele for fragile X syndrome,what is the probability that he will pass it on to his son?

A) 100%
B) 75%
C) 50%
D) 25%
E) 0%

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Question 2

(Multiple Choice)

Free
Assume that a researcher set out to duplicate the Luria-Delbruck fluctuation experiment.This researcher planted twenty small flasks with bacteria from the same colony and let them grow overnight.The next morning the researcher noticed that all but one of the flasks had come open and were ruined.Not wishing to redo the experiment the researcher took bacteria samples from the one remaining intact flask and placed them on twenty phage plates.What results would you expect to see when the twenty phage plates are examined,and how would these results compare with those of the original Luria-Delbruck fluctuation experiment?

A) Identical to the Luria-Delbruck results,namely different numbers of resistant colonies.
B) Identical to the Luria-Delbruck results,namely identical numbers of resistant colonies.
C) Not like the Luria-Delbruck results,namely different numbers of resistant colonies.
D) Not like the Luria-Delbruck results,namely identical numbers of resistant colonies.
E) Identical to the Luria-Delbruck results,namely no resistant colonies.

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Question 3

(Multiple Choice)

Free
The term mutation refers to

A) only changes in the DNA that result in new phenotypes.
B) only changes in the DNA that result in novel proteins.
C) any change in the DNA of a cell.
D) a heritable change in the DNA of a cell.
E) any change in the cell that changes its survival chances.

Answer