Question

In fruit flies, the gene for red eyes (R) is dominant and the gene for sepia eyes (r) is recessive. If a red-eyed homozygous fly (RR) and a red-eyed heterozygous fly (Rr) mate together, what are the possible genotypes of their offspring?

Answer 1

50% of them would be RR and the other 50% would be Rr. I would show you how I did this using Punnett squares but unfortunately I wont be able to draw up a grid in this app but do look it up online.