Q. No.To study whether a gene exhibits multiple allelism or not, one must study:
1. An individual 2. A population 3. A species 4. With concentration!
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A heterozygous plant produces:
| 1. | Only one kind of gamete |
| 2. | Two kinds of gametes, each having one allele with equal proportion. |
| 3. | Two kinds of gametes, each having two alleles with equal proportions. |
| 4. | Two kinds of gametes, each having one allele, with one allele occurring in more gametes than the other. |
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A graphical representation to calculate the probability of all possible genotypes of offspring in a genetic cross is called as:
| 1. | Forked line diagram | 2. | Punnett square |
| 3. | Pedigree chart | 4. | Idiogram |
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When Mendel self-hybridized F1 progeny of a dihybrid cross between pure Yellow Round seeded plants and Green Wrinkled plants, he observed that yellow and green colour segregated in a ratio of:
| 1. | 1 : 1 | 2. | 3 : 1 |
| 3. | 9 : 3 : 3 : 1 | 4. | 1 : 2 : 1 |
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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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