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Which of the following is a genetic disorder caused by the deletion of a portion of the Y chromosome?
- a)Turner syndrome
- b)Klinefelter syndrome
- c)Androgen insensitivity syndrome
- d)XYY syndrome
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Which of the following is a genetic disorder caused by the deletion of...
XYY syndrome is a genetic disorder caused by the presence of an extra Y chromosome in males. This condition can lead to tall stature, learning difficulties, and behavioral challenges.
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Which of the following is a genetic disorder caused by the deletion of...
Understanding Genetic Disorders Related to the Y Chromosome
Genetic disorders can arise from various chromosomal abnormalities, including deletions on the Y chromosome. Among the options provided, only one disorder directly relates to the deletion of a portion of the Y chromosome.
Correct Answer: XYY Syndrome
Explanation of XYY Syndrome
- XYY syndrome is characterized by the presence of an extra Y chromosome in males, resulting in a total of 47 chromosomes (XYY instead of the normal XY).
- This condition typically arises from non-disjunction during meiosis, leading to a sperm cell with two Y chromosomes.
- While not primarily a deletion, it is a chromosomal abnormality involving the Y chromosome.
Other Options Explained
- Turner syndrome:
- Caused by a deletion or absence of one X chromosome in females (45,X).
- Klinefelter syndrome:
- Results from the presence of one or more extra X chromosomes in males (e.g., XXY), not a deletion of the Y chromosome.
- Androgen insensitivity syndrome:
- This condition occurs due to mutations in the androgen receptor gene, leading to a lack of response to male hormones in individuals with XY chromosomes.
Conclusion
While XYY syndrome involves an extra chromosome rather than a deletion, it is the only option that relates directly to abnormalities of the Y chromosome provided in the question. Therefore, option 'D' cannot be considered correct based solely on deletion criteria, but it highlights the complexity of genetic disorders associated with the Y chromosome.
Genetic disorders can arise from various chromosomal abnormalities, including deletions on the Y chromosome. Among the options provided, only one disorder directly relates to the deletion of a portion of the Y chromosome.
Correct Answer: XYY Syndrome
Explanation of XYY Syndrome
- XYY syndrome is characterized by the presence of an extra Y chromosome in males, resulting in a total of 47 chromosomes (XYY instead of the normal XY).
- This condition typically arises from non-disjunction during meiosis, leading to a sperm cell with two Y chromosomes.
- While not primarily a deletion, it is a chromosomal abnormality involving the Y chromosome.
Other Options Explained
- Turner syndrome:
- Caused by a deletion or absence of one X chromosome in females (45,X).
- Klinefelter syndrome:
- Results from the presence of one or more extra X chromosomes in males (e.g., XXY), not a deletion of the Y chromosome.
- Androgen insensitivity syndrome:
- This condition occurs due to mutations in the androgen receptor gene, leading to a lack of response to male hormones in individuals with XY chromosomes.
Conclusion
While XYY syndrome involves an extra chromosome rather than a deletion, it is the only option that relates directly to abnormalities of the Y chromosome provided in the question. Therefore, option 'D' cannot be considered correct based solely on deletion criteria, but it highlights the complexity of genetic disorders associated with the Y chromosome.
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Which of the following is a genetic disorder caused by the deletion of a portion of the Y chromosome?a)Turner syndromeb)Klinefelter syndromec)Androgen insensitivity syndromed)XYY syndromeCorrect answer is option 'D'. Can you explain this answer?
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