A genetic disorder is caused by mutation. Explain how.
A genetic disorder caused by mutation happens when a change in DNA alters the structure or function of a protein.
Key Idea
| Term | Meaning |
|---|---|
| Mutation | Change in DNA sequence |
| Gene | Instructions for making proteins |
| Genetic Disorder | Disease due to faulty gene |
How Mutation Causes Disorder
| Step | Effect | Explanation |
|---|---|---|
| DNA Change | Altered code | Sequence of nucleotides changes |
| Protein Change | Defective protein | Wrong or non functional protein formed |
| Cellular Impact | Function disturbed | Cell cannot perform properly |
| Body Effect | Disease appears | Symptoms show at organism level |
Types of Impact
| Type | Result |
|---|---|
| Loss of Function | Protein stops working |
| Gain of Function | Abnormal activity |
| Partial Function | Reduced efficiency |
Stepwise Understanding
Mutation occurs in a gene
Gene instructions get altered
Protein synthesis changes
Protein does not function correctly
This leads to disease symptoms
Important Concept
Most body functions depend on proteins, so faulty proteins can disrupt normal processes.
Real Insight
Some genetic disorders are inherited while others can occur suddenly due to new mutations, so both cases are possible.
So mutation leads to genetic disorder by disrupting normal protein function.