For the genotype Bb in pattern baldness, what is the expected phenotype for females?

In the context of pattern baldness (also known as androgenetic alopecia), it is important to consider the genetic mechanisms behind this condition. The allele for baldness is typically considered to be sex-linked, with a strong association with the X chromosome. Females have two X chromosomes, therefore their genotype related to this trait can differ significantly from males who have one X and one Y chromosome.

In the case of the genotype Bb, where "B" represents the allele for baldness and "b" represents the normal allele, females with this genotype will not express the bald phenotype. This occurs because the presence of one normal allele (b) on one of their two X chromosomes is sufficient to mask the effect of the bald allele (B). Thus, for females with the Bb genotype, their expected phenotype is normal hair, as the phenotype associated with the bald allele does not manifest in the presence of a normal allele.

This understanding aligns with classical Mendelian inheritance patterns and illustrates how sex-linked traits can express differently in males and females.