This passage describes the iridescent scales trait in bettas:
A betta, or Siamese fighting fish, is a popular aquarium pet. Many bettas have
shiny iridescent scales, which contain tiny crystals that reflect light. These
crystals cause the fish's color to look slightly different when seen from different
angles. Some bettas are covered in mostly iridescent scales. Other bettas have
mostly plain, non-iridescent scales.
In a group of bettas, some individuals have mostly iridescent scales and others have mostly
plain scales. In this group, the gene for the iridescent scales trait has two alleles. The allele
for mostly iridescent scales (I) is dominant over the allele for mostly plain scales (1).
Neptune, a betta from this group, has mostly iridescent scales.
Based on Neptune's phenotype for the iridescent scales trait, which of the following could be
Neptune's genotype for the iridescent scales gene? Select all that apply.
II
Ii
ii