Q. No.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
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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Occasionally, a single gene product may produce more than one effect. Such a gene is said to be:
| 1. | Pleiotropic | 2. | Polygenic |
| 3. | Psuedoallele | 4. | Housekeeping |
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What is the F2 genotypic ratio in cases of incomplete dominance?
| 1. | 1 : 1 | 2. | 3 : 1 |
| 3. | 1 : 2 : 1 | 4. | 1 : 1 |
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Suppose a gene has seven alleles. What would be the number of alleles in an individual at any instant?
| 1. | 1 | 2. | 7 |
| 3. | 2 | 4. | 3 |
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