In a high elevation lake in Peru lives a population of guppies.There are 75 guppies in this lake, 60 of which have blue tails,while the remaining 15 have yellow tails. Tail color in guppies iscontrolled by a single gene. Which of the following statementsabout this population of guppies is true?
| Blue guppies can be either homozygous dominant orheterozygotes. |
| The yellow guppies exhibit the recessive phenotype. |
| Tail color in this population can evolve. |
| All of these statements are true. |
