What kind of object is used in a reflecting telescope to magnify the image.

1. concave lens

2. convex lens

3. concave mirror

4. convey mirror

3. in the fruit fly, recessive mutation brown, b, causes brown color of the eye and absence of red pigment. recessive mutation p of another independent gene causes purple color of the eye and absence of brown pigment. the cross of a brown-eyed female and purple-eyed male produced wild type eyes. what will be the colors and their ratio in f2?