1. | Henking | 2. | Thomas Hunt Morgan |
3. | Sutton and Boveri | 4. | Alfred Sturtevant |
The fruit fly Drosophila melanogaster was found to be very suitable for experimental verification of the chromosomal theory of inheritance by Morgan and his colleagues because:
1. | a single mating produces two young flies |
2. | smaller female is easily recognisable from a large male |
3. | it completes its life cycle in about two weeks |
4. | it reproduces parthenogenetically |
Lack of independent assortment of two genes A and B in the fruit fly Drosophila is due to:
1. Recombination
2. Linkage
3. Crossing over
4. Repulsion
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
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 |