Question

this passage describes the tobiano patterning trait in horses:
the tobiano pattern is a type of coat pattern in horses. horses with tobiano patterning have white legs and rounded white patches on their bodies. their tails may also have a mix of white and colored hairs.
in a group of horses, some individuals have tobiano patterning and others do not. in this group, the gene for the tobiano patterning trait has two alleles. the allele b is for having tobiano patterning, and the allele b is for not having tobiano patterning.
butch, a horse from this group, does not have tobiano patterning. butch has two alleles for not having tobiano patterning.
based on this information, click the blue words to correct any errors in the text.
butch is homozygous for the tobiano patterning gene.
butchs phenotype for the tobiano patterning gene is bb.
butch does not have tobiano patterning. this is butchs genotype for the tobiano patterning trait.

Explanation:

• Phenotype: Phenotype refers to the observable physical characteristics of an organism. In this case, Butch's phenotype is "not having Tobiano patterning" (a physical trait), not the genetic combination \(BB\). \(BB\) is a genotype.
• Genotype: Genotype is the genetic makeup of an organism. Butch has two alleles for not having Tobiano patterning (\(bb\)), so his genotype is \(bb\), not the physical trait of "not having Tobiano patterning".

Answer:

• Click on “phenotype” and change it to “genotype” (because \(BB\) is a genotype, not a phenotype).
• Click on “genotype” and change it to “phenotype” (because “not having Tobiano patterning” is a phenotype, not a genotype).