Q. No.A couple has a daughter. What is the probability that their next child will be a daughter?
1.
0 %
2.
25 %
3.
50 %
4.
100 %
The mechanism of sex determination in grasshoppers is:
| 1. | XX – XY; male heterogamety |
| 2. | XX – XY; female heterogamety |
| 3. | XX – XO; male heterogamety |
| 4. | XX – XO; female heterogamety |
Which of the following father and son duos received Nobel Prize?
| 1. | Nirenbergs | 2. | Kornbergs |
| 3. | Darwins | 4. | Lederbergs |
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 |
“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 |
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 |
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 |
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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