Answer:
- Mutations can also occur as the result of exposure to environmental factors such as smoking, sunlight and radiation. Often cells can recognize any potentially mutation-causing damage and repair it before it becomes a fixed mutation.
- What can trigger mutations?
-Acquired (or somatic) mutations occur at some time during a person's life and are present only in certain cells, not in every cell in the body. These changes can be caused by environmental factors such as ultraviolet radiation from the sun, or can occur if an error is made as DNA copies itself during cell division.
- Can toxic chemicals cause mutations?
-Toxins can cause mutations indirectly by causing cell death, which necessitates replacement by cell division, thus enhancing the opportunity for mutation.
-Germline mutations occur in gametes. Somatic mutations occur in other body cells.
-Chromosomal alterations are mutations that change chromosome structure.
-Point mutations change a single nucleotide.
-Frameshift mutations are additions or deletions of nucleotides that cause a shift in the reading frame.
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