MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Cytogenetics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In pericentric inversion, the inversion loop involves __________ strands. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 2. |
Which of the following is an example of inversion? |
| A. | Chromosome 22 and 9 |
| B. | Chromosome 8 |
| C. | Chromosome 14 |
| D. | Chromosome 3 |
| Answer» E. | |
| 3. |
In drosophila male there is no cross over suppression due to pericentric inversion as___________ |
| A. | They have only one set of chromosome |
| B. | They always have double cross over |
| C. | They never recombine |
| D. | They don’t undergo meiosis |
| Answer» D. They don’t undergo meiosis | |
| 4. |
Long pericentric inversions generally don’t act as cross over suppressors. Why? |
| A. | Long stretches of DNA recombination not recognized |
| B. | Mechanism is different for short and long inversions |
| C. | Two events of crossing over take place |
| D. | Cross over product in this is viable |
| Answer» D. Cross over product in this is viable | |
| 5. |
Consider this sequence A—O—B —C—D—E—F, be a DNA sequence where O is the centromere. Which of the following will be a pericentric inversion? |
| A. | A—O—B—D—E—F |
| B. | B—O—A—D—E—F |
| C. | D—B—O—A—E—F |
| D. | A—O—E—D—B—F |
| Answer» E. | |
| 6. |
WHICH_OF_THE_FOLLOWING_IS_AN_EXAMPLE_OF_INVERSION??$ |
| A. | Chromosome 22 and 9 |
| B. | Chromosome 8 |
| C. | Chromosome 14 |
| D. | Chromosome 3 |
| Answer» E. | |
| 7. |
In_pericentric_inversion,_the_inversion_loop_involves____________strands.$ |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 8. |
In drosophila male there is no cross over suppression due to pericentric inversion as__________? |
| A. | They have only one set of chromosome |
| B. | They always have double cross over |
| C. | They never recombine |
| D. | They don’t undergo meiosis |
| Answer» D. They don‚Äö√Ñ√∂‚àö√ë‚àö¬•t undergo meiosis | |
| 9. |
Long pericentric inversions generally don’t act as cross over suppressors. Why?$ |
| A. | Long stretches of DNA recombination not recognized |
| B. | Mechanism is different for short and long inversions |
| C. | Two events of crossing over take place |
| D. | Cross over product in this is viable |
| Answer» D. Cross over product in this is viable | |
| 10. |
In Drosophila Crossing over in paracentric region is lethal and leads to cross-over suppression. This leads to reduction in fertility. |
| A. | True |
| B. | False |
| Answer» C. | |
| 11. |
What are the results of pericentric inversion with single crossing over? |
| A. | Two normal, one dicentric and one acentric chromosome |
| B. | 2 dicentric and 2 acentric chromosomes |
| C. | Four normal chromosomes with centriomere in different positions |
| D. | 3 normal chromosome, one abnormal acentric chromosome |
| Answer» B. 2 dicentric and 2 acentric chromosomes | |
| 12. |
______________ inversions reduce crossing over in ______________ |
| A. | Paracentric, Heterozygous |
| B. | Pericentric, Heterozygous |
| C. | Paracentric, homozygous |
| D. | Pericentric homozygous |
| Answer» C. Paracentric, homozygous | |
| 13. |
Consider this sequence A—O—B —C—D—E—F, be a DNA sequence where O is the centromere. Which of the following will be a pericentric inversion?$ |
| A. | A—O—B—D—E—F |
| B. | B—O—A—D—E—F |
| C. | D—B—O—A—E—F |
| D. | A—O—E—D—B—F |
| Answer» E. | |
| 14. |
Which of the following is not true about inversion? |
| A. | Inverted chromosomes are generally viable |
| B. | Inversion can cause chromosome breakage |
| C. | Two DNA strands with an inverted segment will not pair |
| D. | Inversion including centromere is known as paracenric |
| Answer» D. Inversion including centromere is known as paracenric | |