DNA Mutations 90%

Based on scientific research, which statement best describes mutations? Mutations are rare occurrences. Mutations are always harmful. Mutations cannot be inherited. Mutations cannot be acquired.

Mutations are rare occurrences.

Which best describes genetic mutations? Some inherited genetic mutations can be good for the offspring. Different genetic mutations cause few forms of cancer. Somatic mutations can be inherited from parents or acquired during life. Genetic mutations that cause diseases are always passed on to offspring.

Some inherited genetic mutations can be good for the offspring.

Which statement is scientifically based? Mutations rarely occur. All mutations are harmful. Some mutations can be contagious, like infections. Mutations are not passed from parent to offspring.

Some mutations can be contagious, like infections. This one is wrong -

Ji wants to write an example of a frameshift mutation using the following sentence: THE CAT SAW THE RAT. Which sentence best shows a frameshift mutation? THC ATS AWT HER AT. CAT THE SAW RAT THE. EHT TAC WAS EHT TAR. THE THE CAT SAW THE RAT.

THC ATS AWT HER AT.

A mutagen is a living thing that has undergone a mutation. an agent that causes a mutation in DNA. a mutation that has affected one gene. any chemical that can poison living cells.

an agent that causes a mutation in DNA.

Many different types of mutations can occur within the body. Tay-Sachs disease is a deadly disorder that is caused by a missing codon in the gene coding for production of the hex A enzyme in the body. Which type of mutation is responsible for causing Tay-Sachs disease? substitution replacement insertion deletion

deletion

Which type of mutation occurs only in reproductive cells? somatic mutation germline mutation point mutation frameshift mutation

germline mutation

The DNA sequence reads ACGTTCATT before a mutation occurs. After the mutation, the DNA sequence reads ATCGTTCATT. Which type of mutation occurred? substitution insertion deletion point

insertion

Many different types of mutations can occur within the body. Sickle cell anemia is a disease that occurs when a mutation in a base pair of the hemoglobin beta gene causes a single replacement of the amino acid glutamic acid by the amino acid valine. As a result of this mutation, the individual's blood cells take on a sickle shape under certain conditions and form clusters that can block blood vessels and cause organ damage. Which type of mutation causes sickle cell anemia? silent missense insertion frameshift

missense

Which type of mutation always produces a stop codon? missense nonsense silent point

nonsense