The branch of biology that deals with inheritance, as well as the variation of characters from parents to offspring, is called as:
1. | Evolution | 2. | Genetics |
3. | Developmental biology | 4. | Forensics |
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In 1900, Mendel’s work was rediscovered by:
1. | Khorana, Nirenberg and Mathei |
2. | de Vries, Correns and von Tschermak |
3. | Avery, McCleod and McCarty |
4. | Watson, Crick and Wilkins |
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The ultimate source of allelic variation is:
1. | Recombination | 2. | Natural selection |
3. | Mutation | 4. | Drift |
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Which of the following was not a character studied by Mendel in garden pea?
1. | Flower position | 2. | Pod shape |
3. | Flower colour | 4. | Pod position |
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What can be the blood groups of progeny whose father and mother are of AB and O blood groups, respectively?
1. | A and B only | 2. | AB only |
3. | All except O | 4. | A, B, AB, and O |
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In the case of starch synthesis in pea seeds [controlled by the B gene], BB homozygotes produce large and round starch grains; bb homozygotes produce smaller and wrinkled starch grains and heterozygotes produce round seeds of intermediate size. What can be inferred from this observation?
1. | The gene B mutates at a faster rate |
2. | The gene B is easily influenced by the environment |
3. | Dominance is not an autonomous feature of a gene or the product that it has information for. |
4. | Some genes do not follow the law of segregation. |
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All generations in Mendel’s Experiments were produced by self pollination except:
1. | P | 2. | F1 |
3. | F2 | 4. | F3 |
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In birds, the mechanism of sex determination is:
1. | XX – XY; male heterogamety |
2. | ZZ – ZW; female heterogamety |
3. | XX – XO; male heterogamety |
4. | ZZ – ZW; male heterogamety |
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When the two genes in a dihybrid cross are situated on the same chromosome:
1. | The proportion of parental gene combinations was much higher than the non-parental type. |
2. | The proportion of parental gene combinations was much lesser than the non-parental type. |
3. | The proportion of parental gene combinations was equal to the non-parental type. |
4. | Only recombinants are formed. |
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In a test cross, the plant expressing the dominant phenotype is crossed with the plant:
1. | Which is heterozygous dominant |
2. | Which is heterozygous recessive |
3. | Which is homozygous recessive |
4. | Which is homozygous dominant |
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