MCQOPTIONS
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MCQOPTIONS
This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is not an example of a holandric trait? |
| A. | Porcupine skin |
| B. | Hypertrichosis |
| C. | Pattern baldness |
| D. | Testes determining factor |
| Answer» D. Testes determining factor | |
| 2. |
Which of the following is a sex-influenced trait? |
| A. | Antlers in male deer |
| B. | Female or male musculature |
| C. | Porcupine skin |
| D. | Pattern baldness |
| Answer» E. | |
| 3. |
Which of the following is not an example of sex-limited traits? |
| A. | Milk glands in females |
| B. | Short index finger in male |
| C. | Beard in male |
| D. | Deep male voice |
| Answer» C. Beard in male | |
| 4. |
Which of the following does not show an environmental mechanism of sex determination? |
| A. | Grasshopper |
| B. | Bonnelia |
| C. | Crepidula |
| D. | Ophryotrocha |
| Answer» B. Bonnelia | |
| 5. |
Which of the following shows gynandromorphism? |
| A. | Pigeon |
| B. | Silk moth |
| C. | Butterflies |
| D. | Grasshopper |
| Answer» C. Butterflies | |
| 6. |
How does Gynander differ from Gynandromorphs? |
| A. | Gynander can only be a male |
| B. | Gynander can only be a female |
| C. | Gynander has patches of tissues of other sex on it |
| D. | Gynander has one half body male and the other half as female |
| Answer» D. Gynander has one half body male and the other half as female | |
| 7. |
What is the X/A ratio of super females of Drosophila? |
| A. | 1 |
| B. | 0.67 |
| C. | 1.5 |
| D. | 0.33 |
| Answer» D. 0.33 | |
| 8. |
Y chromosome plays a very significant role in the sex determination of Drosophila. |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
Which of the following determines is responsible for determining the sex of the bacteria? |
| A. | Plasmid |
| B. | Cytoplasm |
| C. | Core nucleus |
| D. | Vacuole |
| Answer» B. Cytoplasm | |
| 10. |
Accumulation of which of the following in the brain leads to phenylketonuria? |
| A. | Phenylpyruvic acid |
| B. | Pyruvic acids |
| C. | Tyrosine |
| D. | Phenylalanine |
| Answer» E. | |
| 11. |
Which of the following enzymes is not present in the patients of Phenylketonuria? |
| A. | Somatostatin |
| B. | Testosterone |
| C. | Phenylalanine hydroxylase |
| D. | Phenylalanine |
| Answer» D. Phenylalanine | |
| 12. |
Phenylketonuria is a sex-linked dominant trait. |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
Which of the following is not a symptom of phenylketonuria? |
| A. | Mental retardation |
| B. | Reduction in hair |
| C. | White urine |
| D. | Skin pigmentation |
| Answer» D. Skin pigmentation | |
| 14. |
What is the full form of PKU? |
| A. | Phenyl Ketonic Ubisch bodies |
| B. | Para-keto ulna |
| C. | Phenylketonuria |
| D. | Para-keto uremia |
| Answer» D. Para-keto uremia | |
| 15. |
What is the mechanism behind pleiotropy? |
| A. | A single gene controls a single character |
| B. | Effect of a gene on metabolic pathways |
| C. | Effect of multiple genes on multiple pathways |
| D. | Effect of multiple alleles on a biochemical pathway |
| Answer» C. Effect of multiple genes on multiple pathways | |
| 16. |
How is pleiotropy different from polygenic inheritance? |
| A. | A single gene can exhibit multiple expressions |
| B. | A single gene exhibits only a single expression |
| C. | Two genes exhibit a single character |
| D. | Multiple genes control a single character |
| Answer» B. A single gene exhibits only a single expression | |