The accompanying pedigree shows the transmission of a phenotypic character. Using B to represent a dominant allele and b to represent a recessive allele,

Give the genotype(s) possible for each member of the family, assuming the trait is autosomal recessive. 

Key Concepts

Autosomal Recessive Inheritance

In autosomal recessive inheritance, a trait is expressed only when an individual has two copies of the recessive allele (bb). If an individual has one dominant allele (B), the dominant trait will be expressed, masking the recessive trait. This means that carriers (Bb) do not show the phenotype but can pass the recessive allele to their offspring.

Pedigree Analysis

A pedigree is a diagram that depicts the genetic relationships and inheritance patterns within a family. It uses symbols to represent individuals and their phenotypes, allowing for the tracking of traits across generations. Analyzing a pedigree helps determine the possible genotypes of family members based on the observed phenotypes and inheritance patterns.

Genotype Determination

Determining the genotype involves identifying the specific alleles an individual carries for a given trait. In the context of autosomal recessive traits, individuals can be homozygous recessive (bb), homozygous dominant (BB), or heterozygous (Bb). The pedigree analysis will guide the inference of possible genotypes for each family member based on their phenotypic expression and the inheritance pattern.