what do you understand by point mutation

Point mutation is a change in the genetic material where only one nucleotide/base pair in a DNA or RNA sequence is added, removed, or replaced.

Quick Scoop: Simple Meaning

Think of a gene as a long sentence written with four “letters” (A, T, G, C in DNA).
A point mutation is like correcting or introducing a typo in just one letter of that sentence.

• It affects a single nucleotide base pair, not big chunks of a chromosome.

• That base can be:
  • Substituted (one base swapped for another)
  • Inserted (one extra base added)
  • Deleted (one base removed)

Depending on where this change happens, it may:

• Do nothing noticeable (silent mutation).

• Change one amino acid in a protein (missense).

• Create a stop signal too early (nonsense), possibly making a short, nonfunctional protein.

Why It Matters (In One Line)

Even though it is “small,” a point mutation can sometimes completely change how a protein works, stay harmless, or occasionally even be beneficial, depending on the exact change and location.

TL;DR:
Point mutation = a change at a single base pair (added, deleted, or changed) in DNA/RNA that can be harmless, harmful, or occasionally helpful.

Information gathered from public forums or data available on the internet and portrayed here.