Select the incorrect statement w.rt phenetics

Options

A. Numbers and codes are assigned to all observable characters
B. All observable characters are given equal Importance considering sexual characters on the topmost priority
C. Organisation and analysis of data forms core of numerical taxonomy
D. Notations like '0', + and - are used for data not available, presence and absence of character respectively

Answer

To solve the question of selecting the incorrect statement with respect to phenetics, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement 1**: "Numbering codes are assigned to all observable characters."
- This statement is true. In phenetics, observable characters are quantified and assigned numerical codes for analysis.

2. **Statement 2**: "All observable characters are given equal importance considering sexual characters on the top most priority."
- This statement is incorrect. While phenetics does aim to treat all observable characters equally, it does not prioritize sexual characters above others. In fact, taxonomical nomenclature and other factors can take precedence over sexual characteristics.

3. **Statement 3**: "Organization and analysis of data form the core of numerical taxonomy."
- This statement is true. Numerical taxonomy relies heavily on the systematic organization and analysis of data to classify organisms.

4. **Statement 4**: "Notations like 0 for not available, plus for presence, and minus for absence of character respectively."
- This statement is also true. In phenetics, specific notations are used to indicate the presence or absence of characters, as described.

### Conclusion:
After analyzing all the statements, the incorrect statement is **Statement 2**: "All observable characters are given equal importance considering sexual characters on the top most priority."