In a species of fly, the allele for red eyes (R) is dominant to the allele for brown eyes (r). Red eye color in the flies is not sex-linked. Students crossed male and female flies that had red eyes and recorded the eye color of their offspring. Their data are shown below.

FLY OFFSPRING
Eye Color Number of Offspring
Red 77
Brown 27
What are the most likely genotypes of the parent flies?

A
RR and rr
B
Rr and Rr

C
rr and rr
D
RR and Rr

Question

In a species of fly, the allele for red eyes (R) is dominant to the allele for brown eyes (r). Red eye color in the flies is not sex-linked. Students crossed male and female flies that had red eyes and recorded the eye color of their offspring. Their data are shown below.

FLY OFFSPRING
Eye Color	Number of Offspring
Red	77
Brown	27
What are the most likely genotypes of the parent flies?


A
RR and rr
B
Rr and Rr

C
rr and rr
 D
RR and Rr

anonymous · Answer

In a species of fly, the allele for red eyes (R) is dominant to the allele for brown eyes (r). Red eye color in the flies is not sex-linked. Students crossed male and female flies that had red eyes and recorded the eye color of their offspring. Their data are shown below.

FLY OFFSPRING
Eye Color	Number of Offspring
Red	77
Brown	27
What are the most likely genotypes of the parent flies?


A
RR and rr
B
Rr and Rr

C
rr and rr
 D
RR and RrFLY OFFSPRING
Eye Color	Number of Offspring
Red	77
Brown	27