Identification of various mutant type of drosophila
through micro –Photograph
1. Based
on Wings Structures
These are normal fruit flies.
1. These flies with vestigial wings cannot fly.
2.
These flies have a recessive mutation. Of the
pair of vestigial genes carried by each fly (one from each parent), both have
to be altered to produce the abnormal wing shape.
- These flies have curled wings.
- They have a defect in their "curly gene," which is on the second chromosome.
- Having curled wings is a dominant mutation, which means that only one copy of the gene has to be altered to produce the defect.
2. Based
on Body structure
The normal fruit flies, or
"wildtypes," have black-and-tan striped bodies.
1.
These flies have a dark, almost black, body.
2.
They carry a defect in their "ebony
gene," on the third chromosome.
1. These flies are yellower than normal
flies.
2. They have a defect in their "yellow
gene," which is on the X chromosome
