Bio Ch. 14 Learning Curve

Even though the chance of a mutation for one given nucleotide is rare, mutations are rather common when looking at the whole genome.

True

A point mutation that changes a UAC codon into a UAG codon is a:

nonsense mutation

In the technique of replica plating, the purpose of the sterilized velvet is:

to transfer bacterial cells from one agar plate to another.

For a single-nucleotide polymorphism (SNP) with three alleles, how many different diploid genotypes are possible?

6

A newly arisen point mutation always creates a single-nucleotide polymorphism (SNP).

False

Which statement explains the fact that humans have a relatively large number of mutations per genome per generation when compared to other organisms?

Most of a human's DNA is noncoding, so most of the mutations are neutral.

The difference between a single-nucleotide polymorphism (SNP) and a point mutation is that:

a point mutation is when a base pair is changed to a different base pair, whereas a SNP is when the base pair differs among individuals in a population.

Sites in the genome that are more susceptible to mutations than others are called:

Please choose the correct answer from the following choices, and then select the submit answer button.

Hotspots

Spontaneous mutations that occur in somatic cells will be transmitted to offspring.

True

The procedure of replica plating demonstrated that mutations are random with respect to the needs of the organism.

True

Mutations that affect only the individual in which they occur are called _____ mutations; _____ mutations are passed from parent to offspring.

somatic; germ-line

Spontaneous mutations that occur in somatic cells will be transmitted to offspring.

False

Mutation rates per nucleotide per replication:

are highest in viruses.

Consider an A - T versus G - C single-nucleotide polymorphism (SNP) in the human genome. This means that the DNA molecules in the population at this site have which combinations of base pairs?

A-T or G-C

A nucleotide substitution typically has less severe consequences than a nucleotide insertion or deletion.

False

Replica plating showed that mutations for antibiotic resistance are not induced by the presence of the antibiotic because:

antibiotic-resistant cells were already present in colonies never exposed to the antibiotic.