MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 26 Mcqs, each offering curated multiple-choice questions to sharpen your Biotechnology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
How many chromosomes are there in ? |
| A. | 3 |
| B. | 6 |
| C. | 9 |
| D. | 12 |
| Answer» C. 9 | |
| 2. |
How does dosage compensation in occur? |
| A. | Hypertranscription of male X chromosome |
| B. | Hypotranscription of female X chromosome |
| C. | X inactivation in females |
| D. | Chimerism |
| Answer» B. Hypotranscription of female X chromosome | |
| 3. |
Hairy wing character of is due to |
| A. | duplication in region of chromosome |
| B. | deletion in region of chromosome |
| C. | due to presence of additional X-chromosome |
| D. | due to a point mutation |
| Answer» B. deletion in region of chromosome | |
| 4. |
How many chromosomes are there in the budding yeast ()? |
| A. | 16 |
| B. | 17 |
| C. | 18 |
| D. | 20 |
| Answer» B. 17 | |
| 5. |
Bar eye character of is due to |
| A. | duplication in region of 16A of X chromosome |
| B. | deletion in region of 16A of X chromosome |
| C. | due to presence of additional X-chromosome |
| D. | due to a point mutation in eye-locus |
| Answer» B. deletion in region of 16A of X chromosome | |
| 6. |
An odd number of cross overs in inverted region will result into formation of a dicentric chromatid and acentric chromatid at anaphase I incase of |
| A. | pericentric inversion |
| B. | paracentric inversion |
| C. | double inversion |
| D. | none of these |
| Answer» C. double inversion | |
| 7. |
Exchange of segments between non homologous chromosomes is best known as |
| A. | translation |
| B. | translocation |
| C. | recombination |
| D. | crossing over |
| Answer» C. recombination | |
| 8. |
How does dosage compensation in Drosophila occur? |
| A. | Hypertranscription of male X chromosome |
| B. | Hypotranscription of female X chromosome |
| C. | X inactivation in females |
| D. | Chimerism |
| Answer» B. Hypotranscription of female X chromosome | |
| 9. |
Hairy wing character of Drosophila is due to |
| A. | duplication in region of chromosome |
| B. | deletion in region of chromosome |
| C. | due to presence of additional X-chromosome |
| D. | due to a point mutation |
| Answer» B. deletion in region of chromosome | |
| 10. |
A diagram depicting chromosomes of haploid set of an organism ordered in a series of decreasing size is known as |
| A. | zymogram |
| B. | chromogram |
| C. | idiogram |
| D. | karyogram |
| Answer» D. karyogram | |
| 11. |
Incase of inversion when the inverted segment of chromosome includes centromere, it is known as |
| A. | paracentric inversion |
| B. | double inversion |
| C. | inverted inversion |
| D. | pericentric inversion |
| Answer» E. | |
| 12. |
How many chromosomes are there in the budding yeast (S. cerevisiae)? |
| A. | 16 |
| B. | 17 |
| C. | 18 |
| D. | 20 |
| Answer» B. 17 | |
| 13. |
How many chromosomes are there in Caernorhabditis elegans? |
| A. | 3 |
| B. | 6 |
| C. | 9 |
| D. | 12 |
| Answer» C. 9 | |
| 14. |
The percentage of individual with a given genotype, which exhibits the associated phenotype, is defined as |
| A. | penetrance |
| B. | expressivity |
| C. | inheritance percent |
| D. | environmental influence |
| Answer» B. expressivity | |
| 15. |
Diethyl stilbestrol (DES), a synthetic estrogen causes |
| A. | chromosome lagging |
| B. | disruption of mitotic spindle |
| C. | centriole elongation |
| D. | all of the above |
| Answer» E. | |
| 16. |
Bar eye character of Drosophila is due to |
| A. | duplication in region of 16A of X chromosome |
| B. | deletion in region of 16A of X chromosome |
| C. | due to presence of additional X-chromosome |
| D. | due to a point mutation in eye-locus |
| Answer» B. deletion in region of 16A of X chromosome | |
| 17. |
Transmission of a gene from male parent to female child to male grand child is known as |
| A. | holandric inheritance |
| B. | quantitative inheritance |
| C. | criss-cross inheritance |
| D. | maternal inheritance |
| Answer» D. maternal inheritance | |
| 18. |
The degree or extent to which a given genotype is expressed phenotypically in a particular individual is defined as |
| A. | penetrance |
| B. | expressivity |
| C. | inheritance strength |
| D. | environmental influence |
| Answer» C. inheritance strength | |
| 19. |
Which of the following is correct when a character shows continuous variation assuming a normal distribution? |
| A. | It is governed by many genes with small cumulative effect |
| B. | It is not controlled genetically |
| C. | Many of the variation is due to fluctuation of climate |
| D. | None of the above |
| Answer» B. It is not controlled genetically | |
| 20. |
Which of the following denotes a pair of contrasting characters? |
| A. | Alleles |
| B. | Phenotype |
| C. | Homozygous |
| D. | Genotype |
| Answer» B. Phenotype | |
| 21. |
A map of chromosomes that utilizes cloned and sequenced DNA fragments rather than genetic markers is known as |
| A. | a physical map |
| B. | a genetic map |
| C. | a cloning map |
| D. | none of these |
| Answer» B. a genetic map | |
| 22. |
A cross shaped (+) or a ring involving four chromosomes may be formed during metaphase I in case of |
| A. | translocation heterozygote |
| B. | deficiency |
| C. | haploid organism |
| D. | duplication |
| Answer» B. deficiency | |
| 23. |
In an organism, the chromosome number is maintained constant because of |
| A. | independent assortment |
| B. | crossing over |
| C. | DNA duplication |
| D. | synapsis |
| Answer» D. synapsis | |
| 24. |
If two genes show 50% recombination |
| A. | they are on different chromosomes |
| B. | they are on same chromosome but far apart |
| C. | both (a) and (b) |
| D. | they are closely located on the same chromosome |
| Answer» D. they are closely located on the same chromosome | |
| 25. |
In a dihybrid cross, the progeny of an Fl individual (hetero2ygous for both characters) will show a phenotypic ratio of |
| A. | 1:1:1:1 |
| B. | 1:2:2:1 |
| C. | 9:3:3:1 |
| D. | 3:1:1:3 |
| Answer» B. 1:2:2:1 | |
| 26. |
Raphanobrassica is a classical example of |
| A. | aneuploidy |
| B. | nullisomy |
| C. | allopolyploidy |
| D. | None of the above |
| Answer» D. None of the above | |