very confused. can you please explain thank you will rate 5. Which of the follow
ID: 134647 • Letter: V
Question
very confused. can you please explain thank you will rate
5. Which of the following is NOT true about non-disjunction of the sex chromosomes during meiosis I in a human male? A. It results in 4 aneuploid gametes -2 sperm will be 24,XY; 2 sperm will be 22,0 B. It can result in Turner syndrome (45, X)-22,0 sperm + normal (23,X) egg C. It can result in Klinefelter syndrome (47, XXY) - 22,XY sperm +normal egg D. It can result in double -Y syndrome (47, XYY) E. The risk of it occuring does not dramatically increase with age - Risk increases in women but not in men 6. Which of the following (A-D) could NOT lead to the development of a woman with Turner syndrome (45 X12Explanation / Answer
Please find the answers below:
Answer 4: Choice C (Non-disjunctioning event leads to formation of a duplicate copy of chromosomes in the resulting cells. The nature of duplicacy depends upon the type of chromosome undergoing non-disjunctioning. However, in human males, it canresult in both XX or YY syndrome, thus resulting in genetic disorders. Other disorders such as Klienefelter's syndrome etc result due to loss of chromosomes. Thus, they generally do not arise due to non-disjunctioning, but loss of chromosomes.)
Answer 5: Choice D (Double Y chromosome results due to non-disjunctioning during meiosis II, not meiosis I during spermatogenesis)
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