Select the incorrect match from the options given below.

Options

A. Incomplete dominance -Dog flower
B. Pleiotropy - pisum sativum.
C. Female heterogamety - Grasshopper
D. Klinefelter's syndrome - XXY

Answer

To solve the question "Select the incorrect match from the options given below," we will analyze each option provided and determine which one is incorrectly matched.

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Incomplete Dominance**: This is a genetic situation where one allele does not completely dominate another, resulting in a phenotype that is a blend of both alleles.
- **Pleiotropy**: This occurs when one gene affects multiple phenotypic traits.
- **Female Heterogamy**: This refers to a sex determination system where females have two different sex chromosomes (e.g., ZW in birds).
- **Chromosomal Arrangement (XXY)**: This refers to a genetic condition known as Klinefelter syndrome, where a male has an extra X chromosome.

2. **Evaluate Each Option**:
- **Option 1**: Incomplete dominance is mentioned in the context of the dog flower. This is a correct match, as dog flowers exhibit incomplete dominance.
- **Option 2**: Pleiotropy is mentioned in the context of Pisum sativum (pea plants). This is also a correct match, as pea plants show multiple phenotypic traits influenced by single genes.
- **Option 3**: Female heterogamy is mentioned in the context of grasshoppers. This is an incorrect match because grasshoppers exhibit male heterogamy (males have XY chromosomes).
- **Option 4**: The arrangement of chromosomes as XXY is correctly matched with Klinefelter syndrome, which is a genetic condition in males.

3. **Identify the Incorrect Match**:
- The incorrect match is **Option 3**, as it incorrectly associates female heterogamy with grasshoppers.

### Final Answer:
The incorrect match is **Option 3**: Female heterogamy is mentioned in the context of grasshoppers.