Q. No.Identify the incorrect statement regarding experiments on Pisum sativum by Gregor Mendel:
1.
He conducted hybridisation experiments on garden peas for seven years (1856-1863) and proposed the laws of inheritance in living organisms.
2.
It was for the first time that statistical analysis and mathematical logic were applied to problems in biology.
3.
Unfortunately his experiments had a small sampling size, which gave less credibility to the data that he collected.
4.
He investigated characters in the garden pea plant that were manifested as two opposing traits.
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‘When two pairs of traits are combined in a hybrid, segregation of one pair of characters is independent of the other pair of characters’. This is the statement of:
1. Law of Dominance
2. Law of segregation
3. Law of Independent Assortment
4. Law of Linkage
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Mendelian disorders are mainly determined by:
| 1. | Alteration or mutation in a single gene. |
| 2. | Chromosomal gross structural changes. |
| 3. | Recombination between linked genes. |
| 4. | Jumping genes |
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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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