Mutation occur in :-

Options

A. Dominant genes
B. Recessive genes
C. Lethal genes
D. Mendel's ganes

Answer

### Step-by-Step Solution:

1. **Understanding Mutation**:
- A mutation is defined as a sudden change in the genetic sequence. This change can occur in any part of the genome.

2. **Types of Cells**:
- Mutations can occur in two main types of cells:
- **Germinal Cells**: These are reproductive cells (sperm and eggs) that can pass mutations to the next generation.
- **Somatic Cells**: These are all other body cells that do not contribute to the next generation. Mutations in these cells are not inherited.

3. **Types of Genes Affected by Mutation**:
- Mutations can occur in various types of genes:
- **Dominant Genes**: Genes that express their trait even if only one copy is present.
- **Recessive Genes**: Genes that express their trait only when two copies are present.
- **Lethal Genes**: Genes that can cause death when present in certain combinations.
- **Mendelian Genes**: Genes that follow Mendel's laws of inheritance, which include the law of dominance, law of segregation, and law of independent assortment.

4. **Commonality of Mutations**:
- While mutations can occur in any of the above types of genes, they are most commonly found in recessive genes. This is because recessive mutations can remain hidden in heterozygous individuals (carriers) and may only manifest in homozygous individuals.

5. **Mutation Rate**:
- The mutation rate in humans is estimated to be between 10^-4 to 10^-6 per gene per generation, indicating that mutations are a natural part of genetic variation.

6. **Conclusion**:
- In summary, mutations can occur in dominant genes, recessive genes, lethal genes, and Mendelian genes, but they are most frequently observed in recessive genes.