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. |
In an experiment with drosophila eye colour purple/red and wing shape normal/vestigial you observe that offspring mainly have either purple vestigial trait or red normal trait. What is the expected parental trait? |
| A. | Purple long and Red long |
| B. | Red Vestigial and purple long |
| C. | Red vestigial and purple vestigial |
| D. | Purple vestigial and red vestigial |
| Answer» E. | |
| 2. |
What will be the dyhybrid ratio for a cross between HH TT with hh tt? |
| A. | 1:2:1 |
| B. | 9:3:3:1 |
| C. | All same |
| D. | 3:1 |
| Answer» D. 3:1 | |
| 3. |
In an organism you observe that phenotypes of the progeny are as – 315 H/H R/R, 108 H/-r/r, 101 h/h R/-, 32 h/h r/r. This shows_____ |
| A. | Linkage |
| B. | Lethal alleles |
| C. | Epistasis |
| D. | Normal ratio |
| Answer» E. | |
| 4. |
If you include more number of genes in the cross, a branched diagram will be easier to find progeny phenotype. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
WHAT_WILL_BE_THE_DYHYBRID_RATIO_FOR_A_CROSS_BETWEEN_HH_TT_WITH_HH_TT??$ |
| A. | 1:2:1 |
| B. | 9:3:3:1 |
| C. | All same |
| D. | 3:1 |
| Answer» D. 3:1 | |
| 6. |
In an experiment with drosophila eye colour purple/red and wing shape normal/vestigial you observe that offspring mainly have either purple vestigial trait or red normal trait. What is the expected parental trait?$ |
| A. | Purple long and Red long |
| B. | Red Vestigial and purple long |
| C. | Red vestigial and purple vestigial |
| D. | Purple vestigial and red vestigial |
| Answer» E. | |
| 7. |
By crossing homozygous short purple flowering parent with a heterozygous tall purple flowering parent you get 41 tall progeny. What will be the expected number of short progenies? |
| A. | 12 |
| B. | 42 |
| C. | 60 |
| D. | 80 |
| Answer» C. 60 | |
| 8. |
In an organism you observe that phenotypes of the progeny are as – 315 H/H R/R, 108 H/-r/r, 101 h/h R/-, 32 h/h r/r. This shows_____$ |
| A. | Linkage |
| B. | Lethal alleles |
| C. | Epistasis |
| D. | Normal ratio |
| Answer» E. | |
| 9. |
If you have an organism with the genotype Pp HH rr Ww this can be used as a parent in test cross for________ |
| A. | H locus |
| B. | R locus |
| C. | W locus |
| D. | P locus |
| Answer» C. W locus | |
| 10. |
Considering a dihybrid cross, what is the probability of the progeny being heterozygous at both the alleles? |
| A. | 1/16 |
| B. | 4/16 |
| C. | 7/16 |
| D. | 9/16 |
| Answer» C. 7/16 | |
| 11. |
If you cross homozygous recessive short plant with heterozygous purple flower to heterozygous tall plant with heterozygous purple flower, what will be the expected phenotypic ratio? |
| A. | 9:3:3:1 |
| B. | 4:4:2:2 |
| C. | 3:1:3:1 |
| D. | 1:2:1:2:4:2:1:2:1 |
| Answer» D. 1:2:1:2:4:2:1:2:1 | |
| 12. |
Which of the following will be pure breeding for only one character? |
| A. | Hh Rr |
| B. | HH Rr |
| C. | HH RR |
| D. | hh rr |
| Answer» C. HH RR | |
| 13. |
The expected phenotypic ratio obtained by crossing the F1 generation in dihybrid cross would be? |
| A. | 3:1 |
| B. | 1:2:1 |
| C. | 9:3:3:1 |
| D. | 1:2:1:2:4:2:1:2:1 |
| Answer» D. 1:2:1:2:4:2:1:2:1 | |