The X-body was first identified by

Options

A. Mendel-1856
B. Khoraa-1922
C. Griffith 1928
D. Henking 1891

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks who first identified the X-body. The X-body is associated with the X chromosome.

2. **Analyzing the Options**: We have four options to consider:
- A) Mendel (1856)
- B) Quran (1922)
- C) Griffith (1928)
- D) Henking (1891)

3. **Researching the X-body**: The X-body was first noted in relation to the X chromosome. It is important to find out which scientist made this identification.

4. **Identifying the Correct Scientist**:
- Herman Henking is known for his work in the late 19th century.
- In 1890, he studied the testicles of the insect *Pyrochroa* and observed that one chromosome did not participate in meiosis.

5. **Conclusion**: Based on Henking's observations, he concluded that the chromosome he identified was the X chromosome, which he referred to as the X-body. Therefore, the correct answer is option D: Henking (1891).

**Final Answer**: The X-body was first identified by Henking in 1891.

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