Datura is a classical example of study of

Options

A. Monosomics
B. Trisomics
C. Triploids
D. Nullisomics

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about Datura and its significance in genetic studies. We need to identify what Datura is a classical example of among the given options: monosomics, trisomics, trapezoids, or neurosomics.

2. **Identifying Datura**: Datura is a genus of flowering plants, and one of the well-known species is Datura stramonium, commonly known as Jimson weed.

3. **Researching Genetic Studies**: Datura stramonium is particularly noted for studies related to trisomy, which is a condition where an organism has an extra chromosome.

4. **Historical Context**: The first trisomics were discovered in Datura stramonium by A.F. Blakeslee and his co-workers. This research was significant in understanding chromosomal abnormalities.

5. **Chromosome Count**: In Datura stramonium, the haploid chromosome number (n) is 12. This means the diploid number (2n) is 24. The primary trisomy refers to having one extra chromosome in the diploid set, leading to a total of 25 chromosomes.

6. **Types of Trisomy**: The study of Datura has revealed various types of trisomies, including primary and secondary trisomies, as well as tertiary trisomies, which are identified based on morphological features.

7. **Conclusion**: Based on the information gathered, Datura is a classical example of trisomics. Therefore, the correct answer to the question is "trisomics."

**Final Answer**: Datura is a classical example of the study of **trisomics**.

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