Consider the following statements for reproduction in organisms and choose the correct ones.
I. The selection of the mode of reproduction depends on organism's habitat, physiology and complexity.
II. Exact copies of organisms are produced via asexual reproduction.
III. Gametes in sexual reproduction are produced in gonads, which are mesodermal in origin.
IV. Sexual reproduction involves genetic recombination via crossing over between non-homologous chromosomes of both parents.
Select the correct codes.

Options

A. I, II and III
B. II, III and IV
C. I, II and IV
D. All of these

Answer

To solve the question regarding the statements about reproduction in organisms, we will analyze each statement one by one to determine which are correct.

### Step-by-Step Solution:

1. **Statement I**: "The selection of the mode of reproduction depends on organism's habitat, physiology, and complexity."
- **Analysis**: This statement is true. The mode of reproduction does depend on various factors including the organism's habitat (environment), physiology (biological functions), and complexity (level of organization). For example, simpler organisms may reproduce asexually, while more complex organisms tend to reproduce sexually.
- **Conclusion**: This statement is **correct**.

2. **Statement II**: "Exact copies of organisms are produced via asexual reproduction."
- **Analysis**: This statement is also true. Asexual reproduction results in offspring that are genetically identical to the parent organism, hence they are exact copies.
- **Conclusion**: This statement is **correct**.

3. **Statement III**: "Gametes in sexual reproduction are produced in gonads, which are mesodermal in origin."
- **Analysis**: This statement is true. Gametes (sperm and eggs) are produced in the gonads (testes and ovaries), and these gonads develop from the mesoderm layer during embryonic development.
- **Conclusion**: This statement is **correct**.

4. **Statement IV**: "Sexual reproduction involves genetic recombination via crossing over between non-homologous chromosomes of both parents."
- **Analysis**: This statement is false. Genetic recombination during sexual reproduction occurs through crossing over between homologous chromosomes, not non-homologous chromosomes. Non-homologous chromosomes do not undergo crossing over.
- **Conclusion**: This statement is **incorrect**.

### Summary of Correct Statements:
- Statements I, II, and III are correct.
- Statement IV is incorrect.

### Final Answer:
The correct codes for the statements are I, II, and III.