Select the statements that is correct regarding arrhenotoky and thelytoky.

Options

A. In arrhenotoky , only males are produced by parthenogenesis , while in thelytoky only females are produced by parthenogenesis .
B. In arrhenotoky , only females are produced by parthenogenesis , while in thelytoky only males are produced by parthenogenesis .
C. In arrhenotoky , only either males or females are produced by parthenogenesis , while in thelytoky only females are produced by parthenogenesis .
D. In arrhenotoky , only males are produced by parthenogenesis , while in thelytoky either males or females are produced by parthenogenesis .

Answer

To solve the question regarding the correct statements about arrhenotoky and thelytoky, we need to understand the definitions and processes involved in both terms.

### Step-by-Step Solution:

1. **Define Arrhenotoky**:
- Arrhenotoky is a form of parthenogenesis where unfertilized eggs develop into males. This means that in arrhenotoky, only male offspring are produced from unfertilized eggs.

2. **Define Thelytoky**:
- Thelytoky is another form of parthenogenesis where unfertilized eggs develop into females. Therefore, in thelytoky, only female offspring are produced from unfertilized eggs.

3. **Analyze the Statements**:
- **Statement 1**: "In Arrhenotoky, only males are produced by Parthenogenesis, while in Thelytoky, only females are produced by Parthenogenesis."
- This statement is correct based on the definitions provided.
- **Statement 2**: "In Arrhenotoky, only females are produced by Parthenogenesis, while in Thelytoky, only males are produced by Parthenogenesis."
- This statement is incorrect as it contradicts the definitions.
- **Statement 3**: "Only either male or female are produced by the Parthenogenesis."
- This statement is misleading because it implies that both can be produced, which is not true for either process.
- **Statement 4**: "In Arrhenotoky, only males are produced by Parthenogenesis while in Thelytoky either males or females are produced by Parthenogenesis."
- This statement is incorrect as it misrepresents thelytoky.

4. **Conclusion**:
- The only correct statement regarding arrhenotoky and thelytoky is the first one: "In Arrhenotoky, only males are produced by Parthenogenesis, while in Thelytoky, only females are produced by Parthenogenesis."

### Final Answer:
The correct statement regarding arrhenotoky and thelytoky is:
- "In Arrhenotoky, only males are produced by Parthenogenesis, while in Thelytoky, only females are produced by Parthenogenesis."