Questions: Question 4 0.5 pts Mutations that are passed from one generation to the next occur in somatic cells occur in the sex cells are only due to radiation affect both parents and offspring Question 5 0.5 pts If the DNA nucleotide changed from an A to a T, this is called a point mutation germ-cell mutation somatic mutation frameshift mutation

Question 4:
The answer is the second one: occur in the sex cells.
Explanation:

• Occur in somatic cells: Incorrect. Mutations in somatic cells are not passed to the next generation; they only affect the individual in which they occur.
• Occur in the sex cells: Correct. Mutations in sex cells (sperm or egg) can be passed to the next generation, as these cells contribute to the genetic makeup of offspring.
• Are only due to radiation: Incorrect. Mutations can be caused by various factors, including chemical exposure, errors during DNA replication, and more, not just radiation.
• Affect both parents and offspring: Incorrect. While mutations in sex cells can affect offspring, they do not necessarily affect both parents.

Question 5:
The answer is the first one: point mutation.
Explanation:

• Point mutation: Correct. A point mutation is a change in a single nucleotide base pair in DNA, such as changing an A to a T.
• Germ-cell mutation: Incorrect. This term refers to mutations in germ cells, but it does not specify the type of mutation.
• Somatic mutation: Incorrect. This refers to mutations in somatic cells, not the type of mutation.
• Frameshift mutation: Incorrect. A frameshift mutation involves the insertion or deletion of nucleotides that changes the reading frame of the genetic sequence, not a single nucleotide change.

In summary, mutations passed to the next generation occur in sex cells, and a change from an A to a T in DNA is a point mutation.