A. The graphical representation to calculate the probability of all possible genotypes of offsprings in a genetic cross was developed by Gregor Mendel.
B. Failure of segregation of chromatids during cell division results in aneuploidy.
C. Additional copy of 'X' chromosome in males results in Klinefelter's syndrome.
D. Closely located genes in a chromosome always assort independently resulting in recombinants.
E. According to Mendel, recessive character never blend in heterozygous condition.
F. Failure of cytokinesis after DNA replication results in polyploidy.
G. A person affected with phenylketonuria, lacks an enzyme that converts the amino acid phenylalanine into tyrosine, How many wrong statements are given in above statements.

Options

A. Four
B. Three
C. Two
D. One

Answer

To determine how many statements are wrong in the provided list, we will analyze each statement one by one:

### Step-by-Step Solution:

1. **Statement A**: "The graphical representation to calculate the probability of all possible genotypes of offsprings in a genetic cross was developed by Gregor Mendel."
- **Analysis**: This statement is correct. Mendel used a Punnett square to represent the probabilities of offspring genotypes.

2. **Statement B**: "Failure of segregation of chromatids during cell division results in aneuploidy."
- **Analysis**: This statement is correct. Aneuploidy occurs when there is an improper segregation of chromosomes during cell division.

3. **Statement C**: "Additional copy of 'X' chromosome in males results in Klinefelter's syndrome."
- **Analysis**: This statement is correct. Klinefelter's syndrome is characterized by the presence of an extra X chromosome in males (XXY).

4. **Statement D**: "Closely located genes in a chromosome always assort independently resulting in recombinants."
- **Analysis**: This statement is incorrect. Closely located genes tend to be linked and do not assort independently, which reduces the likelihood of recombination.

5. **Statement E**: "According to Mendel, recessive character never blend in heterozygous condition."
- **Analysis**: This statement is correct. Mendel's principle states that dominant traits mask recessive traits in a heterozygous condition, meaning there is no blending.

6. **Statement F**: "Failure of cytokinesis after DNA replication results in polyploidy."
- **Analysis**: This statement is incorrect. Failure of cytokinesis leads to multinucleated cells, not polyploidy. Polyploidy is a condition where the entire set of chromosomes is duplicated.

7. **Statement G**: "A person affected with phenylketonuria lacks an enzyme that converts the amino acid phenylalanine into tyrosine."
- **Analysis**: This statement is correct. In phenylketonuria (PKU), the enzyme phenylalanine hydroxylase is absent, preventing the conversion of phenylalanine to tyrosine.

### Summary of Findings:
- **Correct Statements**: A, B, C, E, G
- **Incorrect Statements**: D, F

### Conclusion:
There are **2 wrong statements** (D and F).

### Final Answer:
The number of wrong statements is **2**.

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