Certain neutrophils of female mammals possess  

Options

A. bilobed nuclues
B. multilobed nucleus attached with extra copy of X-chromosome
C. Spherical nucleus
D. irregularly lobed nucleus

Answer

### Step-by-Step Solution:

1. **Understanding Neutrophils**: Neutrophils are a type of white blood cell (leukocyte) that play a crucial role in the immune response. They are characterized by their multi-lobed nuclei and are essential for fighting infections.

2. **Identifying the Context**: The question specifically refers to neutrophils in female mammals. In females, one of the X chromosomes is often inactivated and forms a structure known as a Barr body.

3. **Analyzing the Options**:
- **Option A: Bilobe nucleus** - This refers to a nucleus that is divided into two lobes. While some neutrophils can have a bilobed appearance, this is not specific to female mammals.
- **Option B: Multilobe nucleus attached with extra copy of X chromosome** - This option describes neutrophils in female mammals that have a multilobed nucleus and an additional X chromosome, which is characteristic of female cells due to the presence of Barr bodies.
- **Option C: Spherical nucleus** - This describes a nucleus that is round in shape, which is not typical for neutrophils.
- **Option D: Irregularly lobe nucleus** - This describes a nucleus that does not have a regular shape, but it does not specifically relate to the neutrophils of female mammals.

4. **Selecting the Correct Answer**: Based on the analysis, the correct answer is **Option B: multilobe nucleus attached with extra copy of X chromosome**. This is because female mammals have neutrophils that exhibit this characteristic due to the presence of Barr bodies.

5. **Conclusion**: The neutrophils of female mammals possess a multilobe nucleus attached with an extra copy of the X chromosome.