Question

this passage describes the bekko patterning trait in koi fish: the bekko pattern is a pattern of colors found on the bodies of some koi fish. a koi fish with bekko patterning has black patches all over its body. a koi fish without bekko patterning does not have these patches. in a group of koi fish, some individuals have bekko patterning and others do not. in this group, the gene for the bekko patterning trait has two alleles. the allele for not having bekko patterning (b) is recessive to the allele for having bekko patterning (b). gill, a koi fish from this group, has bekko patterning. based on gills phenotype for the bekko patterning trait, which of the following could be gills genotype for the bekko patterning gene? select all that apply. bb bb bb

Explanation:

Step1: Recall Dominant/Recessive Rules

Dominant allele (B) masks recessive (b). Phenotype with Bekko needs at least one B.

Step2: Analyze Each Genotype

• \( BB \): Two dominant alleles, shows Bekko (correct).
• \( Bb \): One dominant, masks recessive, shows Bekko (correct).
• \( bb \): Two recessive alleles, shows no Bekko (incorrect, as Gill has Bekko).

Answer:

A. \( BB \), B. \( Bb \)