MCQOPTIONS
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MCQOPTIONS
This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Genetics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Match the terms in Group I with the ploidy in Group II. Group I Group II P. Disome 1. 2n + 1 Q. Monosome 2. 2n 1 R. Nullisome 3. n 1 S. Trisome 4. n + 1 |
| A. | P- 4 , Q-2 , R- 3 , S-1 |
| B. | P- 4 , Q-3 , R- 1 , S- 2 |
| C. | P- 2 , Q-3 , R- 4 , S-1 |
| D. | P- 1 , Q-4 , R- 3 , S- 2 |
| Answer» B. P- 4 , Q-3 , R- 1 , S- 2 | |
| 2. |
A crossing was performed between the genotypes DdEeFfgg and ddEeFfGg. Assuming that the allelic pairs of all genes assort independently, the proportion of progeny having the genotype ddeeffgg is expected to be ____________%. |
| A. | 1.3 to 1.8 |
| B. | 4.1 to 5.6 |
| C. | 3 |
| D. | None of the above |
| Answer» B. 4.1 to 5.6 | |
| 3. |
Match the type of chromosomal inheritance (Column-I) with the corresponding genetic disease or trait (Column-II). Column-I P. Autosomal recessive inheritance Q. Autosomal dominant inheritance R. X-linked inheritance S. Y-linked inheritance Column-II 1. Huntington disease 2. Hairy ears 3. Cystic fibrosis 4. Hemophilia Codes: |
| A. | P-1 , Q-4 , R-3 , S-2 |
| B. | P-4 , Q-3 , R-2 , S-1 |
| C. | P-3 , Q-1 , R-4 , S-2 |
| D. | P-4 , Q-2 , R-3 , S-1 |
| Answer» D. P-4 , Q-2 , R-3 , S-1 | |
| 4. |
In a genetic cross between the genotypes WWXX and wwxx, the following phenotypic distributions were observed among the F2 progeny: WX, 562; wx, 158; Wx, 38; and wX, 42. Likewise, a cross between XXYY and xxyy yielded the following results: XY, 675; xy, 175; Xy, 72; and xY, 78. Similarly, a cross between WWYY and wwyy yielded: WY, 292; wy, 88; Wy, 12; and wY, 8. In all the genotypes, capital letters denote the dominant allele. Assume that the F1 progeny were self-fertilized in all three crosses. Also, double cross-over does not occur in this species. Which of the following is correct? |
| A. | Relative position: W-X-Y Distances: W-X = 5 map units, X-Y = 17 map units |
| B. | Relative position: X-Y-W Distances: X-Y = 15 map units, Y-W = 11 map units |
| C. | Relative position: Y-W-X Distances: Y-W = 5 map units, W-X = 11 map units |
| D. | Relative position: X-W-Y Distances: X-W = 5 map units, W-Y = 10 map units |
| Answer» D. Relative position: X-W-Y Distances: X-W = 5 map units, W-Y = 10 map units | |
| 5. |
True breeding Drosophila flies with curved wings and dark bodies were mated with true breeding short wings and tan body Drosophila. The F1 progeny was observed to be with curved wings and tan body. The F1 progeny was again allowed to breed andproduced flies of the following phenotype, 45 curved wings tan body, 15 short wings tan body, 16 curved wings dark body and, 6 short wings dark body. The mode of inheritance is |
| A. | Typical Mendelian with curved wings and tan body being dominant |
| B. | Typical non-Mendelian with curved wings and tan body not following any pattern |
| C. | Mendelian with suppression of phenotypes |
| D. | Mendelian with single crossover |
| Answer» B. Typical non-Mendelian with curved wings and tan body not following any pattern | |
| 6. |
In transgenics, alterations in the sequence of uncleotide in genes are due to P. Substitution Q. Deletion R. Insertion S. Rearrangement |
| A. | P and Q |
| B. | P, Q and R |
| C. | Q and R |
| D. | R and S |
| Answer» C. Q and R | |