Q. No.A plant, on repeated self-pollination, preserves the trait expressed for many generations. Such a plant is said to be:
1.
Panmictic
2.
Homologous
3.
Apomictic
4.
Pure line
What is the F2 phenotypic ratio in cases of incomplete dominance?
| 1. | 1 : 1 | 2. | 3 : 1 |
| 3. | 1 : 2 : 1 | 4. | 1 : 1 |
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“Chromosomes, which are seen in all dividing cells and pass from one generation to the next, are the basis for all genetic inheritance”.
This statement is credited to:
| 1. | Watson and Crick | 2. | Hershey and Chase |
| 3. | Sutton and Boveri | 4. | Meselson and Stahl |
The famous double helix model of DNA was proposed by Watson and Crick in ____ and they shared Nobel Prize for Physiology or Medicine in ________ for their effort.
| 1. | 1951, 1971 | 2. | 1943, 1963 |
| 3. | 1953, 1962 | 4. | 1969, 1972 |
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In Mendel’s experiments, the contrasting traits did not show any blending in:
| 1. | F1 stage |
| 2. | F2 stage |
| 3. | Both F1 and F2 stages |
| 4. | The statement is false as blending was seen at all stages |
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What could be the genotype of a garden pea plant that expresses the tall trait of height?
| 1. | TD | 2. | Tt |
| 3. | Td | 4. | tt |
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The law of segregation is based on the fact that :
1. The alleles do not show any blending.
2. There is random fertilization
3. Gametes are pure for the trait
4. The zygotes are diploid
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Which of the following is a recessive trait for a character chosen by Mendel in garden pea?
| 1. | Violet flower colour | 2. | Yellow pod colour |
| 3. | Axial flower position | 4. | Tall stem height |
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Identify the incorrect statement:
| 1. | Tall plant produces gametes by meiosis and the dwarf plant by mitosis. |
| 2. | Only one allele is transmitted to a gamete. |
| 3. | This segregation of alleles is a random process. |
| 4. | Gametes will always be pure for the trait. |
Blood group antigens are:
| 1. | Carbohydrates present in plasma |
| 2. | Carbohydrates present on the surface of RBCs |
| 3. | Plasma proteins |
| 4. | Proteins present on the surface of RBCs |
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