Q. No.Morgan coined the term ______ to describe this physical association of genes on a chromosome and the term _________ to describe the generation of non-parental gene combinations.
1. Recombination; Linkage 2. Linkage, Mutation 3. Transposition, Mutation 4. Linkage, Recombination
Occasionally, a single gene product may produce more than one effect. Such a gene is said to be:
| 1. | Pleiotropic | 2. | Polygenic |
| 3. | Psuedoallele | 4. | Housekeeping |
Suppose a gene has seven alleles. What would be the number of alleles in an individual at any instant?
| 1. | 1 | 2. | 7 |
| 3. | 2 | 4. | 3 |
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 |
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