7. A chromosome other than a sex MEDGAR EVERS COLLEGE-CUNY BIOLOGY DEPARTMENT BI

Question

7. A chromosome other than a sex MEDGAR EVERS COLLEGE-CUNY BIOLOGY DEPARTMENT BIOL-302 GENETICS LABORATORY TEST- SUMMER-II GULYD 2018 (Total points: 50 chromosome i e. Chromosomes that are not directly involved in determining sex, known A. Diploid B. Autosome C. Germ cell D. None of the above 8. What is the karyotype for a man with one I. Which of the following is the best sample extra X chromosome? for the investigation of human A. 47, XXY B. 47, XXX C. 47, XYY D. None of the above A Onion root tip B. Rat testes C. Blood leukocytes D. None of the above What is the karyotype for a woman with Down syndrome? 2. Which of the following is true for the length of human chromosomes? A. The largest is about 10jum long and the A. 47, XX, +21 B. 46, XX, 21 C. 47, XX, +18 D. smallest is about 2 ?m long None of the above B. The largest is approximately 10cm long and the smallest is about 2 cm long The p arm and q arm of chromosomes ane always the same All of the above are true What is the karyotype for a man with Down syndrome? 10. C. D. 3. Which of the following statement is/are true A 47, XY +21 B. 47, XX+21 C. D. 45, X None of the above for karyotype? A. Assemblage of metaphase chromosomes B. Arranged in pair C. Both A&B; D. None of the above 11. Which of the following represents the A. B. C. D. karyotype of a woman having Turner Syndrome? 45, X 47, XY +13 44. X None of the above You are viewing a patient's karyotype. You see 23 chromosomes total. There are no homologous chromosomes. Which cell are you viewing? 4. Karyotype of a female newborn having trisomy 18 (Edward syndrome 12. A. Egg cell B. Zygot C. Skin cell D. Human leukocyte A 47, XX+ 18 B. 46, XY, 5p- C. Both A & B D. None of the above In a karyogram, chromosome pairs are arranged According to the order of descending length and position of centromene According to thickness of chromosomes Based on the abnormalities chromosome None of the above 5. A. 13. The phase of cell division in karyotype is A. Prophase B. Metaphase C. Anaphase D. Telophase B. C. present on the D. 6. A. B. Short arms are designated p and long arms 14. Structural chromosome aberration Which of the following statement is true for occur in one member of a pair. Which of the following is not the type of structural alteration? Chronosome bands are observed with ethidium bromide staining are designated q There are always 23 chromosomes in human None of the above A. Translocation B. Point mutation C. Deletion D. Inversion C. D. 15. A. What is another name of Down syndrome? Trisomy 21

Explanation / Answer

Ans.

1. C

blood leukocytes

2. B

3. C

both a and b

4. A

egg cell as it is haploid

5. A

6. B

7. B

autosome

8. A

47, XXY

9. A

47,XX, +21

10. A

47, XY , +21

11. A

45,X

12. A

47,XX, +18

13. B

metaphase

14.   B

point mutation

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