Some fruit flies have orange eyes, while others have red eyes. If two orange-eyed fruit flies are crossed, every offspring has orange eyes. If two red-eyed fruit flies are crossed, the offspring may have orange eyes or red eyes. What conclusion can be drawn from these observations?
- AThe allele for orange eyes is dominant.
- BThe allele for orange eyes is recessive.
- CThe alleles for orange and red eyes are codominant.
- DThis is an example of sex linkage.