If an individual has the genotype bb, what alleles can it pass on to its offspring?

A simple example to illustrate genotype as distinct from phenotype is the flower colour in pea plants (see Gregor Mendel). There are three available genotypes, PP (homozygous dominant), Pp (heterozygous), and pp (homozygous recessive).

The alleles can bb genotype pass to its offspring is b alleles.

Explanation:

The genotype is a genetic makeup or genetic constitute of an individual. Genotype express alleles of the individual. Genotype bb is a homozygous condition of alleles in an individual.

The given homozygous bb will form two games as it has two recessive b alleles and passes these alleles to offspring.

Thus, The alleles can bb genotype pass to its offspring is b alleles.