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, we need to analyze each statement provided in the options and determine which one is incorrect based on Mendelian genetics.

### Step-by-Step Solution:

1. **Understanding the Statements**:
- **Option A**: "Characters are controlled by the discrete unit called factors."
- This statement is correct. Gregor Mendel referred to genes as "factors," which are the units that determine traits.

2. **Analyzing Option B**:
- **Option B**: "Factors occur in a pair."
- This statement is also correct. Genes (or factors) typically exist in pairs (alleles), one inherited from each parent.

3. **Examining Option C**:
- **Option C**: "In a similar part of a factor, one member of a pair dominates the other which is recessive."
- This statement is incorrect. When both alleles are similar (homozygous), there is no dominant or recessive relationship because they are identical. Dominance occurs only when the alleles are different (heterozygous).

4. **Reviewing Option D**:
- **Option D**: "Homozygous parents produce all gametes that are similar."
- This statement is correct. Homozygous parents (having two identical alleles for a trait) will produce gametes that are all the same, carrying the same allele.

5. **Conclusion**:
- The incorrect statement is **Option C**, as it misrepresents the relationship between alleles when they are similar.

### Final Answer:
The incorrect statement is **Option C**.