Please help. Medal will be awarded!!

In fruit flies, the gene for red eyes (R) is dominant and the gene for sepia eyes (r) is recessive. If a red-eyed heterozygous fly (Rr) mates with a sepia-eyed homozygous fly (rr), what are the possible genotypes of their offspring? (Hint: You many want to complete a Punnett square.)

a: Rr only
b: RR, Rr, and rr
c: Rr and rr
D: RR and rr

Question

Please help. Medal will be awarded!!

In fruit flies, the gene for red eyes (R) is dominant and the gene for sepia eyes (r) is recessive. If a red-eyed heterozygous fly (Rr) mates with a sepia-eyed homozygous fly (rr), what are the possible genotypes of their offspring? (Hint: You many want to complete a Punnett square.) 


a: Rr only
b: RR, Rr, and rr
c: Rr and rr
D: RR and rr

anonymous · Answer

Have you worked it out already?

anonymous · Answer

I did. but I don't think it's right. I ended up getting C

anonymous · Answer

That's correct! I got that too.  Whenever I worked it out, I got Rr and rr so, those are the possible genotypes.

anonymous · Answer

Omigosh! Thanks!

anonymous · Answer

You're welcome!