MCQOPTIONS
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MCQOPTIONS
This section includes 10 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 animals cytological study of recombination was done by_______________ |
| A. | Barbara McClintok |
| B. | Stern |
| C. | Creigton |
| D. | Mandel |
| Answer» C. Creigton | |
| 2. |
You cross a p+/v+ p+/v+ male drosophila to a p-/v- p-/v- and obtain the F1 hybrid. Now you cross the F1 male with double recessive female. What will be the recombination phenotype in F2? |
| A. | p+/v+ p-/v- only |
| B. | p+/v+ p-/v- and p-/v- p-/v- |
| C. | p+/v+ p-/v- and p-/v- p-/v- also p+/v- p-/v- and p-/v- p-/v- |
| D. | p+/v+ p-/v- and p-/v- p-/v- also p-/v+ p-/v- and p-/v- p-/v- |
| Answer» C. p+/v+ p-/v- and p-/v- p-/v- also p+/v- p-/v- and p-/v- p-/v- | |
| 3. |
Double crossovers can involve two, three or four strands at a time. What will be the resultant percentage of recombined genes to normal genes in between which recombination occurred, taking all three types in consideration? |
| A. | 0% |
| B. | 50% |
| C. | 70% |
| D. | 90% |
| Answer» C. 70% | |
| 4. |
Recombination occurs in _________ |
| A. | Single strand stage |
| B. | Two strand stage |
| C. | Three strand stage |
| D. | Four stand stage |
| Answer» E. | |
| 5. |
Accurate mapping of genes can be done using _______ |
| A. | Two point mapping |
| B. | Three point mapping |
| C. | Single gene mapping |
| D. | None of the mentioned |
| Answer» C. Single gene mapping | |
| 6. |
If you suddenly observe linkage between two genes that are present in two chromosomes, this can be due to __________________ |
| A. | Coupling |
| B. | Translocation |
| C. | Inversion |
| D. | Non-homologous end joining |
| Answer» C. Inversion | |
| 7. |
Linkage results in __________ |
| A. | Formation of more Dominant phenotype |
| B. | Formation of more Wild phenotype |
| C. | Formation of more parental phenotype |
| D. | Formation of more recombinant phenotype |
| Answer» D. Formation of more recombinant phenotype | |
| 8. |
In Drosophila males there is complete linkage. What is the reason behind this? |
| A. | The genes are very closely located |
| B. | Coupling theory |
| C. | No synapsis |
| D. | Unknown reason |
| Answer» D. Unknown reason | |
| 9. |
Linkage ________ as the distance between two genes ______________ |
| A. | Decreases, decreases |
| B. | Unaffected, Decreases |
| C. | Decreases, Increases |
| D. | Increases, Increases |
| Answer» D. Increases, Increases | |
| 10. |
The tendency of linkage is directly proportional to the rate of crossing over between two genes. |
| A. | True |
| B. | False |
| Answer» C. | |