a. | It can be grown in laboratory. |
b. | It should have large number of chromosomes. |
c. | It should produce large number of progenies in a single mating |
d. | Male and female individuals can be easily distinguishable |
e | It should also be reproduce through asexual means. |
1. | Genes for eye colour and body colour are present on the same chromosome but gene for wing size on different chromosome |
2. | Genes for eye colour and body colour, both are present on the same chromosome |
3. | There is no gene that controls the wing size is present on Y chromosome |
4. | 50% sperms in Drosophila do not have the genes for eye colour, body colour and wing size |
1. | This child either male or female will not show any symptom of the trait |
2. | The child will show the trait only if he is a male |
3. | This child will show mild symptom of the trait regardless of the gender |
4. | The child will show the trait only if she is a female |
1. | Transmits the trait to her sons only |
2. | Has 50% probability of transmission of the mutant gene to the progeny |
3. | Is considered diseased and dies before maturity |
4. | Is normal and does not pass the trait for sickle cell anaemia to her progeny |