Which of the following does NOT reflect(s)the likely presence of a gene mutation(s)?
A)Fruit flies subjected to intense radiation breed a wider array of variable offspring.
B)A chemical leaking from the surface of an old abandoned coal mine alters a regulatory gene so that a cricket nymph develops an extra set of eyes.
C)The bacteria that cause gonorrhea,a common sexually transmitted disease,have previously been killed by penicillin; however,after continuous usage of the antibiotic,penicillin-resistant strains are now becoming prevalent.
D)Radiation causes an alteration of a DNA nucleotide sequence which is discovered when mapped,but which appears to be neither increasing nor decreasing in successive generations.
E)Offspring always have the same coloration as the parents.

Question

Quizplus · Accepted Answer

Offspring having the same coloration as the parents is a normal feature and does not necessarily reflect the presence of a gene mutation. Variability in offspring (option A), altered physical features (option B), antibiotic resistance (option C), and altered DNA nucleotide sequences (option D) are all indicators of the presence of gene mutations.

Which of the Following Does NOT Reflect(s)the Likely Presence of a Gene