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 heterozygous fly (Rr) mates with a sepia-eyed h0m0zygous fly (rr), what are the possible genotypes of their offspring? (Hint: You may want to complete a Punnett square.)

Rr only
RR, Rr, and rr
Rr and rr
RR and Rr

Answer 1

Rr and rr.

I did a punett square and that is what I found.

Answer 2

Rr and rr

Step-by-step explanation:

assumeing that a punnet sqaure in use. a 2 by 2 tabel shows each combination. and combos with a dominant gene allways inherits the dominant trait with a chance to pass off to the next offspring