After reading the paragraphs below, answer the questions that follow. Mr. and Mr

Question

After reading the paragraphs below, answer the questions that follow. Mr. and Mrs. Smith have three sons in elementary school. Two of their children are progressing normally, but their youngest son, Charles, has been much slower than his siblings in developing speech and language skills. His parents are concerned that he has a learning disability and decide to investigate further. Since some learning disabilities can be genetically based, their pediatrician recommends a chromosomal analysis. The results show that Charles has a trisomy of the sex chromosomes, diagnosed as XYY. A mistake during sperm formation resulted in an extra copy of the Y chromosome. The extra copy was passed on to Charles during fertilization. Most often, this chromosomal change causes no unusual physical features or medical problems, but those with trisomy of the sex chromosomes may have a higher-than-normal risk of delays in learning development. During which stage of meiosis could this mistake have occurred? O telophase lI O telophase l anaphase ll prophase I

Explanation / Answer

I believe the correct answer to be C) Anaphase II since at this stage chromosomes get seperated and if problem occurs at this stage both chromosomes YY in this case would be transferred to single cell.

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