What would a WT of Drosophilia melanogster with red eyes have to cross with to create...
What would a WT of Drosophilia melanogster with red eyes have to cross with to create flies with the vermilion pigment?
Homework Answers
Red eye = Xr+Xr+, Xr+Xr, Xr+Y
Vermillion = XrXr, XrY
For this,
The wild type drosophila should have Xr+Xr genotype (red eye).
The male should be XrY (vermillion).
Xr+Xr × XrY
| Gametes | Xr | Y |
| Xr+ | Xr+Xr (red eyed female) | Xr+Y (red eyed male) |
| Xr | XrXr (vermillion female) | XrY (vermillion male) |
Phenotypic ratio - 2 (red) : 2 (female)
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