Question

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

Answer 1

So here we have two heterozygous organisms that will mate. You can put them into a Punnet square, just to be sure of your answers and to find all possible genotypes : 

      R      r
R  RR   Rr
r   Rr     rr

So you have RR, Rr and rr as your possible genotypes. 

Answer 2

Answer:

R      r

R  RR   Rr

r   Rr     rr

Therefore, you have RR, Rr and rr as your possible genotypes.

Explanation:

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