You need a guppy which has a blue gene, because your target guppy’s color is blue.
A red guppy and a yellow guppy don’t have the gene to make the guppy have a blue body.
So, the answer is the guppy in the center!

This is a question about the semi dominant gene.
The red class can be made by setting the blue class’s gene of dominance.
If a guppy has the recessive gene, he won’t become a red class, only a blue guppy will have the possibility to be able to preset the gene dominance.
So, the answer is the left guppy!

The male guppy has the gene to have a pink body, so you need the gene to have a speckle in the caudal fin.
It is only the green guppy that has a speckle in the caudal fin from the choices.
So, the answer is the right guppy!

This is a question about the law of dominance.
The guppy in center is a kind of albino red class, and there are the guppies which are similar.
The albino red class can be made by setting the red class’s gene of recessive.
This guppy is different from a normal red class in terms of his shape.
The guppy in center is an albino, because it has red eyes.
So, the answer is the guppy in the center!