Question

What is a point mutation and how does it occur?

Answer 1

Point mutation:

1. When a single base pair is added, removed, or modified in a genome, it is called a point mutation.
2. Chemical interactions can result in a point mutation when they are severe enough.
3. Environmental properties such as extreme heat and other temperature changes may also be a factor.
4. Point mutations can also be caused by DNA modification, such as exposure to X-rays or UV light.

Occurrence of point mutation:

1. When a single base pair is added, removed, or modified in a genome, it is called a point mutation.
2. While most point mutations are harmless, they can have a variety of functional effects, such as variations in gene expression or encoded proteins.
3. Due to substitution, just one base pair of DNA is changed in point mutation.
4. Substitution, deletion, and insertion are the three forms of point mutations.
5. A point mutation causes sickle-cell anaemia, which is a genetic condition.