Which of the following character is not taken into consideration while preparing a karyotype

Options

A. Chromosomal length
B. Arm ratio
C. Position of sec. constriction
D. Length of chromonemata

Answer

To answer the question, "Which of the following character is not taken into consideration while preparing a karyotype?", we need to understand what a karyotype is and the factors that are considered when preparing one.

### Step-by-Step Solution:

1. **Understanding Karyotype**:
- A karyotype is the number and appearance of chromosomes in the nucleus of a eukaryotic cell. It provides important information about the chromosomal composition of an organism.

2. **Factors Considered in Karyotyping**:
- When preparing a karyotype, several factors are taken into account:
- **Length of the Chromosome Arms**: The relative lengths of the chromosome arms are important for identifying chromosomes.
- **Position of the Centromere**: The centromere's position helps in classifying chromosomes into different types.
- **Banding Pattern**: The specific banding patterns observed under a light microscope are crucial for distinguishing between different chromosomes.
- **Differences Between Sex Chromosomes**: Any differences between sex chromosomes are also noted.

3. **Identifying the Incorrect Option**:
- The question provides four options:
- Arm Ratio
- Chromosomal Length
- Secondary Constriction
- Chromomita
- We need to identify which of these is not typically considered when preparing a karyotype.

4. **Analysis of Options**:
- **Arm Ratio**: This is considered as it relates to the length of the chromosome arms.
- **Chromosomal Length**: This is also considered as it helps in identifying the chromosomes.
- **Secondary Constriction**: This is a specific feature of some chromosomes but is not a primary factor in karyotyping.
- **Chromomita**: This term is not standard in karyotyping and does not refer to a recognized characteristic.

5. **Conclusion**:
- The character that is not taken into consideration while preparing a karyotype is **Chromomita**.

### Final Answer:
The character that is not taken into consideration while preparing a karyotype is **Chromomita**.