Exam 16: Gene Mutation and Dna Repair

After growing a culture of

In the following sequence of DNA, the italicized base has been mutated. What type of mutation is this? 5' - G A T C T C C G A A T T - 3' original strand 5' - G A T C T C C C A A T T - 3' mutated strand

Trisomy-18, in which individuals have three copies of chromosome 18 is an example of a mutation.

A mutation in a promoter region that causes the promoter sequence to more closely resemble the consensus sequence is called a up promoter mutation and decreases transcription.

Utilizes MutL, MutH, and MutS proteins in

Silent mutations are possible due to the degenerate nature of the genetic code.

Breakpoints in chromosome can lead to mutant phenotypes when they occur in the middle of a gene.

The mutation frequency is the number of mutant genes in a given population.

The Ames test may be used to determine if an agent is a mutagen.

Darwin's theory of natural selection supported the directed mutation theory.

In the nucleotide excision repair system, which of the following proteins is responsible for recognizing a thymine dimer to be repaired?

The term polarity is associated with mutations in eukaryotic cells.

Which of the following is an example of a base analog?

A temporary change in the structure of a nitrogenous base is called .

Identifies daughter strands by methylation.

Forward and reverse mutations indicate the evolutionary importance of the mutation.

HRR requires the presence of a sister chromatid.

How does position effect influence gene expression?

A heritable change in the genetic material is called a mutation.

The most common genotype in a population is called the mutant genotype.