Single-Gene Test Crosses Recall that in the fruit fly Drosophila melanogaster, the ebony-body allele (e) is recessive to the normal yellow-body allele (E). Say you are given a male fly with a ...

Just before Christmas, two backyard birders in Michigan were in for the ultimate surprise–a yellow Northern Cardinal. Arlene and John McDaniel spotted the incredibly rare bird in their backyard in ...