Two identical alleles for a trait, such as BB or bb, describe a group that is described as:

• A. Purebred
• B. Hybrid
• C. Phenotype
• D. Genotype

Answer: (A)

Having two identical alleles for a trait means the genotype is homozygous. When a group shares that same homozygous condition for a trait, they’re described as purebred for that trait, since they carry the same allele on both chromosomes and tend to pass that same allele to offspring, producing uniform results. A hybrid would have two different alleles (heterozygous) and lead to more variation in offspring. The phenotype is the outward trait, not the genetic makeup, and genotype refers to the actual allele combination itself, not the grouping description. So, describing the group as purebred best captures the idea of identical alleles across individuals for that trait.