Q. No.The genes controlling the seven pea characters studied by Mendel are now known to be located on how many different chromosomes:
1. Seven
2. Six
3. Five
4. Four
Which one of the following traits of garden peas studied by Mendel was a recessive feature?
| 1. | Axial flower position |
| 2. | Green seed colour |
| 3. | Green pod colour |
| 4. | Round seed shape |
Which one of the following conditions, though harmful in itself, is also a potential saviour from a mosquito-borne infectious disease?
| 1. | Thalassaemia | 2. | Sickle cell anaemia |
| 3. | Pernicious anaemia | 4. | Leukemia |
Pattern baldness, moustaches, and beard in human males are examples of:
1. Sex-linked traits
2. Sex-limited traits
3. Sex-differentiating traits
4. Sex-determining traits
When a cluster of genes shows linkage behaviour they:
1. Do not show a chromosome map
2. Show recombination during meiosis
3. Do not show independent assortment
4. Induce cell division
Christmas disease is another name for:
1. Haemophilia B
2. Hepatitis B
3. Down's syndrome
4. Sleeping sickness
In Drosophila, the sex is determined by:
| 1. | The ratio of the number of X-chromosomes to the sets of autosomes |
| 2. | X and Y chromosomes |
| 3. | The ratio of pairs of X-chromosomes to the pairs of autosomes |
| 4. | Whether the egg is fertilized or develops parthenogenetically |
A genetic map is one that:
| 1. | Establishes sites of the genes on a chromosome |
| 2. | Establishes the various stages in gene evolution |
| 3. | Shows the stages during the cell division |
| 4. | Shows the distribution of various species in a region |
Independent assortment of genes does not take place when:
| 1. | Genes are located on homologous chromosomes |
| 2. | Genes are linked and located on the same chromosome |
| 3. | Genes are located on non-homologous chromosome |
| 4. | All the above |
Mendel obtained wrinkled seeds in peas due to the deposition of sugars instead of starch. It was due to which enzyme:
1. Amylase
2. Invertase
3. Diastase
4. Absence of starch branching enzyme
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