Write the chromosomal defect in individuals affected with Klinefelter's syndrome.

Explanation

**Step-by-Step Solution:**

1. **Understanding Klinefelter's Syndrome:**
Klinefelter's syndrome is a genetic condition that affects males. It is characterized by the presence of an extra sex chromosome.

2. **Normal Male Chromosomal Composition:**
In a typical male, the chromosomal composition consists of 46 chromosomes, which includes 44 autosomes and 2 sex chromosomes (XY).

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