The disease in which an individual has extra sex chromosome (44 + XXY) is known as:
Correct answer: C. Klinefelter's syndrome
- A. Down's syndrome
- B. Turner's syndrome
- C. Klinefelter's syndrome
- D. Jacob's syndrome
Explanation
Klinefelter's syndrome is a genetic disorder that affects males, characterized by the presence of an extra X chromosome. The most common karyotype in Klinefelter's syndrome is 47 + XXY, indicating an additional X chromosome. Individuals with Klinefelter's syndrome may have physical, hormonal, and developmental differences.
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About Chromosomes
Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
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