Neurospora crossa is widely used in genetical stufies because of all the following except one

Options

A. It is a haploid plant and mutations can be easily detected
B. It can be easily cultured
C. Life cycle short
D. Spores are not affected by mutagens

Answer

### Step-by-Step Solution:

1. **Identify the Organism**: Neurospora crassa is a type of fungus, specifically classified under the Ascomycetes group. It is commonly known as the red bread mold.

2. **Understand Its Importance in Genetics**: Neurospora crassa is widely used in genetic studies due to several advantageous characteristics:
- **Short Life Cycle**: This allows for rapid generation of offspring, making it easier to observe genetic changes over time.
- **Easily Cultured**: It can be easily maintained in laboratory conditions, allowing for controlled experiments.
- **Haploid Nature**: Being haploid means that it has only one set of chromosomes. This allows for the expression of recessive traits, making it easier to study gene functions and mutations.

3. **Reproductive Mechanism**: Neurospora crassa reproduces through spores, specifically two types: conidia and ascospores. This reproductive strategy facilitates genetic studies, as spores can be manipulated and analyzed.

4. **Evaluate the Options**: The question asks for the exception among the reasons why Neurospora crassa is used in genetic studies. The options generally highlight its advantages, but one option states that "spores are not affected by mutations."

5. **Identify the Incorrect Statement**: The statement that "spores are not affected by mutations" is incorrect. In fact, spores can and do undergo mutations, which is a key aspect of genetic research. Therefore, this is the reason that does not support the use of Neurospora crassa in genetic studies.

6. **Conclusion**: The correct answer to the question is that Neurospora crassa is widely used in genetic studies because of all the following except that "spores are not affected by mutations."