Q. No.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
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 |
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 |
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! |
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. |
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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