MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Cytogenetics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The genes that Mendel worked with were__________________ |
| A. | Variable in penetrance and expressivity |
| B. | Variable in penetrance only |
| C. | Variable in expressivity only |
| D. | 100% penetrant with 100% expressivity |
| Answer» E. | |
| 2. |
Expressivity may be thought of as a result of different degrees of function of the protein encoded by the gene. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
Expessivity doesn’t depend on which of the following factors? |
| A. | Environment |
| B. | Penetrance |
| C. | Genotype |
| D. | Linkage |
| Answer» E. | |
| 4. |
EXPRESSIVITY_MAY_BE_THOUGHT_OF_AS_A_RESULT_OF_DIFFERENT_DEGREES_OF_FUNCTION_OF_THE_PROTEIN_ENCODED_BY_THE_GENE.?$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
The_genes_that_Mendel_worked_with_were__________________$ |
| A. | Variable in penetrance and expressivity |
| B. | Variable in penetrance only |
| C. | Variable in expressivity only |
| D. | 100% penetrant with 100% expressivity |
| Answer» E. | |
| 6. |
Expessivity doesn’t depend on which of the following factors?# |
| A. | Environment |
| B. | Penetrance |
| C. | Genotype |
| D. | Linkage |
| Answer» E. | |
| 7. |
Neurofibrilomatosis varies in ________________ |
| A. | Penetrance |
| B. | Expressivity |
| C. | Both penetrance and expressivity |
| D. | It is 100% penetrant and expressive |
| Answer» D. It is 100% penetrant and expressive | |
| 8. |
Which of the following trait shows only variation in expressivity? |
| A. | Brachydactyly |
| B. | Osteoporosis imperfectica |
| C. | Pea seed colour |
| D. | Polydactyly |
| Answer» C. Pea seed colour | |
| 9. |
Expressivity depends on penetrance. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
If the gene is non-penetrant then which of the following is not right? |
| A. | The pedigree chart will not express the defecting phenotype in that individual |
| B. | The person’s children are not likely to express that phenotype |
| C. | The expressivity is 0% |
| D. | The genotype here didn’t make its proper phenotypic expression |
| Answer» C. The expressivity is 0% | |
| 11. |
Choose the incorrect option about penetrance. |
| A. | If penetrance is 100% all recessive genotype shows one phenotype |
| B. | If penetrance is 100% the expressivity is 100% |
| C. | If penetrance is 100% all the heterozygotes have similar phenotype |
| D. | If penetrance is 100% all the dominant genotypes have a different phenotype from recessive |
| Answer» C. If penetrance is 100% all the heterozygotes have similar phenotype | |
| 12. |
It is known that homozygous dominant gene for a type of cone gives brown colour. The formation of cones with brown, yellow colour expresses the _______________ and white expresses the _______________ |
| A. | Penetrance, expressivity |
| B. | Expressivity, genotype |
| C. | Genotype, Phenotype |
| D. | Expressivity, penetrance |
| Answer» E. | |
| 13. |
An individual with a homozygous genotype for a particular phenotype ____________ expresses the phenotype. |
| A. | Always |
| B. | Never |
| C. | Sometimes |
| D. | Unknown relation |
| Answer» D. Unknown relation | |