Union of two gametes of one sex is known as

Options

A. Apogamy
B. Parthenoapogamy
C. Parthenogamy
D. Parthenogenesis.

Answer

To solve the question "Union of two gametes of one sex is known as," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**:
- The question asks for the term that describes the union of two gametes from the same sex.

2. **Analyzing the Options**:
- We have four options to consider:
- A) Apogamy
- B) Parthenoapogamy
- C) Parthenogamy
- D) Parthenogenesis

3. **Evaluating Option A (Apogamy)**:
- Apogamy refers to a type of reproduction where a sporophyte develops from a gametophyte without the fusion of gametes.
- Since the question specifically mentions the union of gametes, this option does not fit.
- **Conclusion**: Eliminate Option A.

4. **Evaluating Option B (Parthenoapogamy)**:
- Parthenoapogamy is the development of a new plant from a single gametophytic cell without fusion of gametes.
- Again, this does not involve the union of two gametes.
- **Conclusion**: Eliminate Option B.

5. **Evaluating Option C (Parthenogamy)**:
- Parthenogamy is defined as the union of two gametes of one sex. This directly matches what the question is asking for.
- **Conclusion**: This option is a strong candidate and seems to be the correct answer.

6. **Evaluating Option D (Parthenogenesis)**:
- Parthenogenesis is the development of a new organism from a single ovum or female gamete without fertilization.
- This does not involve the union of gametes either.
- **Conclusion**: Eliminate Option D.

7. **Final Answer**:
- After evaluating all options, the correct answer is **C) Parthenogamy**.