Q. No.Which one from those given below are the periods for Mendel's hybridization experiments?
1. 1856 - 1863
2. 1840 - 1850
3. 1857 - 1869
4. 1870 – 1877
1. 1856 - 1863
2. 1840 - 1850
3. 1857 - 1869
4. 1870 – 1877
Among the following characters, which one was not considered by Mendel in his experiments on pea?
| 1. | Stem - Tall or Dwarf |
| 2. | Trichomes - Glandular or non-glandular |
| 3. | Seed - Green or Yellow |
| 4. | Pod - Inflated or Constricted |
What is the F2 genotypic ratio in cases of incomplete dominance?
| 1. | 1 : 1 | 2. | 3 : 1 |
| 3. | 1 : 2 : 1 | 4. | 1 : 1 |
Sickle cell anaemia results from:
| 1. | A chromosomal aberration |
| 2. | Non-disjunction of autosome |
| 3. | A point mutation |
| 4. | Blood transfusion reaction |
A man of which of the following blood groups could not be the father of a group O child?
1. A
2. B
3. O
4. AB
Genes which are tightly linked on chromosome show :
| 1. | Very low recombination |
| 2. | High recombination |
| 3. | Very low parental combination |
| 4. | Clear cut independent assortment |
In a testcross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant type offspring. This indicates:
| 1. | Both of the characters are controlled by more than one gene. |
| 2. | The two genes are located on two different chromosomes. |
| 3. | Chromosomes failed to separate during meiosis. |
| 4. | The two genes are linked and present on the same chromosome. |
A gene showing codominance has:
| 1. | alleles tightly linked on the same chromosome |
| 2. | alleles that are recessive to each other |
| 3. | both alleles independently expressed in the heterozygote |
| 4. | one allele dominant on the other |
In his classic experiments on pea plants, Mendel did not use
| 1. | Pod length | 2. | Seed shape |
| 3. | Flower position | 4. | Seed colour |
Which is the most common mechanism of genetic variation in the population of a sexually-reproducing organism?
| 1. | Chromosomal aberrations |
| 2. | Genetic drift |
| 3. | Recombination |
| 4. | Transduction |
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