| 1. | 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 |
| View Answer Report Discuss 50-50! |
|
Answer: (a).1:1:1:1
|
| 2. | In an organism, the chromosome number is maintained constant because of |
| a. | independent assortment |
| b. | crossing over |
| c. | DNA duplication |
| d. | synapsis |
| View Answer Report Discuss 50-50! |
|
Answer: (c).DNA duplication
|
| 3. | How many chromosomes are there in the budding yeast (S. cerevisiae)? |
| a. | 16 |
| b. | 17 |
| c. | 18 |
| d. | 20 |
| View Answer Report Discuss 50-50! |
|
Answer: (a).16
|
| 4. | 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 |
| View Answer Report Discuss 50-50! |
|
Answer: (a).It is governed by many genes with small cumulative effect
|
| 5. | Raphanobrassica is a classical example of |
| a. | aneuploidy |
| b. | nullisomy |
| c. | allopolyploidy |
| d. | None of the above |
| View Answer Report Discuss 50-50! |
|
Answer: (c).allopolyploidy
|