Select the incorrect statement from the following.

Options

A. Characters are controlled by discrete unit called factors
B. Factors occurs in pair
C. In a similar part of factors one member of the pair dominates (dominant) the other ( recessive)
D. homozygous parent produces all gametes they are similar

Answer

To solve the question of selecting the incorrect statement from the provided options, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Statements**: We need to analyze each statement provided in the question to determine which one is incorrect.

2. **Evaluate the First Statement**:
- "Characters are controlled by discrete units called factors."
- This statement is correct. In genetics, traits are indeed controlled by discrete units known as genes or factors.

3. **Evaluate the Second Statement**:
- "Factors occur in pairs."
- This statement is also correct. Genes typically exist in pairs (alleles) in diploid organisms.

4. **Evaluate the Third Statement**:
- "In a similar part of factors, one member of the pair dominates and the other is recessive."
- This statement is incorrect. The correct context is that in a dissimilar pair of factors (heterozygous), one allele can dominate over the other. In a similar pair (homozygous), both alleles are the same, and there is no dominance.

5. **Evaluate the Fourth Statement**:
- "Homozygous parents produce all gametes that are similar."
- This statement is correct. Homozygous parents will produce gametes that are identical because they have the same alleles.

6. **Conclusion**:
- The incorrect statement is the third one, which misrepresents the relationship between similar and dissimilar factors.

### Final Answer:
The incorrect statement is: "In a similar part of factors, one member of the pair dominates and the other is recessive."

---