HSA 2006 Biology Item 17print

HSA 2006 Biology Item 17

CID
CIDdf869cc7c55d1f0d4806aa05668d793d
itemNum
17
initialLetter
A
itemType
SR
itemAnswerKey
2
itemMaxScorePoints
1
origNum
x

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.

What are the most likely genotypes of the parent flies?

  1. RR and rr
  2. Rr and Rr
  3. rr and rr
  4. RR and Rr

SRclose