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 of selecting the incorrect match from the options provided, we will analyze each option step by step.

### Step 1: Analyze Incomplete Dominance and Dog Flower
- **Definition**: Incomplete dominance occurs when one allele is not completely dominant over the other, resulting in a blending of traits.
- **Example**: In the case of dog flowers, crossing red and white flowers produces pink flowers in the offspring.
- **Conclusion**: This is a correct match.

**Hint**: Look for examples where traits blend rather than one trait dominating the other.

### Step 2: Analyze Pleiotropy and Pisum Sativum
- **Definition**: Pleiotropy is when a single gene influences multiple phenotypic traits.
- **Example**: In Pisum sativum (the pea plant), a single gene can affect traits such as flower color and seed shape.
- **Conclusion**: This is a correct match.

**Hint**: Consider how one gene can affect multiple traits in an organism.

### Step 3: Analyze Female Heterogamete and Grasshopper
- **Definition**: Heterogamety refers to the presence of two different types of sex chromosomes in an individual.
- **Example**: In grasshoppers, males are heterogametic (XY) while females are homogametic (XX).
- **Conclusion**: The statement that grasshoppers have female heterogamety is incorrect; therefore, this is the incorrect match.

**Hint**: Check the sex chromosome composition in the organism to determine if the statement is true.

### Step 4: Analyze Klinefelter Syndrome and XXY
- **Definition**: Klinefelter syndrome is a genetic condition where males have an extra X chromosome, resulting in an XXY chromosome pattern.
- **Conclusion**: This is a correct match.

**Hint**: Remember that Klinefelter syndrome specifically involves an extra X chromosome in males.

### Final Conclusion:
The incorrect match from the options given is **female heterogamete and grasshopper**. Grasshoppers have male heterogamety (XY) and female homogamety (XX).

### Summary of the Incorrect Match:
- **Incorrect Match**: Female heterogamete - Grasshopper
- **Correct Information**: Grasshoppers are male heterogametic (XY) and females are homogametic (XX).