Q. No.A cell at the telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at the telophase stage. There is no formation of the cell plate and thus the cell is containing more chromosomes as compared to other dividing cells. This would result in:
1. Polyteny
2. Aneuploidy
3. Polyploidy
4. Somaclonal variation
1. Polyteny
2. Aneuploidy
3. Polyploidy
4. Somaclonal variation
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The mechanism that causes a gene to move from one linkage group to another is called
1. Crossing-over
2. inversion
3. duplication
4. translocation
Which one from those given below are the periods for Mendel's hybridization experiments?
1. 1856 - 1863
2. 1840 - 1850
3. 1857 - 1869
4. 1870 – 1877
Among the following characters, which one was not considered by Mendel in his experiments on pea?
1. Stem - Tall or Dwarf
2. Trichomes - Glandular or non-glandular
3. Seed - Green or Yellow
4. Pod - Inflated or Constricted
The genotypes of a Husband and Wife are IAIB and IAi .
Among the blood types of their children how many different genotypes and phenotypes are possible
1. 3 genotypes ; 3 phenotypes
2. 3 genotypes; 4 phenotypes
3. 4 genotypes ; 3 Phenotypes
4. 4 genotypes ; 4 phenotypes
Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement :
| 1. | Both are due to a qualitative defect in globin chain synthesis. |
| 2. | Both are due to a quantitative defect in globin chain synthesis. |
| 3. | Thalassemia is due to less synthesis of globin molecules. |
| 4. | Sickle cell anemia is due to a quantitative problem of globin molecules |
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A disease caused by an autosomal primary non-disjunction is:
1. Down's Syndrome
2. Klinefelter's Syndrome
3. Turner's Syndrome
4. Sickle Cell Anemia
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Match each item in Column I with one in Column II and select your answer from the codes given:
| Column I | Column II | ||
| Scientist | Contribution | ||
| A. | Francis Crick | a. | Breaking the genetic code |
| B. | Nirenberg | b. | Established Coenorhabditiselegans as a model genetics study organism |
| C. | Benzer | c. | Central dogma of molecular biology |
| D. | Brenner | d. | Bacteriophage genetics |
Codes:
| A. | B. | C. | D. | |
| 1. | c | a | d | b |
| 2. | c | a | b | d |
| 3. | a | b | c | d |
| 4. | a | c | d | b |
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The inheritance of flower colour in dog flower and 4’O clock plant exhibits:
| 1. | Complete dominance | 2. | Incomplete dominance |
| 3. | Co-dominance | 4. | Lethality |
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Morgan coined the term ______ to describe this physical association of genes on a chromosome and the term _________ to describe the generation of non-parental gene combinations.
| 1. | Recombination; Linkage | 2. | Linkage, Mutation |
| 3. | Transposition, Mutation | 4. | Linkage, Recombination |
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