Zoology 8th Edition by Stephen Miller,John Harley

تمرين 49

A student carried out a cross between two fruit flies. One fly was homozygous for vestigial wings and also homozygous for sepia eyes. The second fly was heterozygous for vestigial wings and homozygous for wild eyes. The offspring expected from this cross would
A) all be vestigial winged, but one-half of the flies would have sepia eyes and one-half would have wild eyes.
B) all have wild eyes, but one-half of the flies would have vestigial wings and one-half would have wild wings.
C) show the following phenotypes in equal numbers: wild wings, wild eyes; wild wings, sepia eyes; vestigial wings, wild eyes; and vestigial wings, sepia eyes.
D) show the following phenotypes in a 9:3:3:1 ratio: wild wings, wild eyes; wild wings, sepia eyes; vestigial wings, wild eyes; and vestigial wings, sepia eyes.