Medical Genetics Homework-2.doc
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1、) Medical Genetics Homework-2Student Number: Name: . Pick the best answer and write in the corresponding blanks: 12345671. Which of the following chromosomal aberrations can be of either sex: A. XYY B. XXY C. trisomy 21 D. monosomic X 2. Which of the following techniques was mostly used to detect a
2、trisomy? A. RFLP B. Southern blotting C.FISH D. PCR-SSCP 3. If an eneuploid with a karyotype that is 2N +1 has 9 chromosomes, what is the normal haploid number of this species?A. 10 B. 9 C. 8 D. 5 E. 4 4. Each of the following chromosome abnormalities involves a 20 megabase region of the long arm of
3、 chromosome 5 (5q). Which abnormality is most likely to cause severe disease?A. Deletion of the region B. Duplication of the regionC. A balanced translocation involving the region (i.e., in the translocation carrier)D. Pericentric inversion 5. Which of the following is not true of Fragile X syndrome
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