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Cellular and Molecular Biology

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Moderate

True Reversion Mutation

CELLS-FNNHS1

A true reversion mutation is one that exactly reverses a previous mutation; the original DNA sequence is restored.

Which of the following original mutations is MOST likely to be corrected by a later true reversion mutation?

A

Formation of a thymine dimer.

B

Substitution of a C by a G.

C

Duplication of a chromosomal segment by unequal crossing over.

D

Deletion of a large DNA sequence.