Using the theories of pedigree, we got that If represents a male with the homozygous recessive genotype (aa),the mother genotype is homozygous recessive.
A pedigree is the diagram that depicts the biological relationships between an organism and its ancestors. It comes from the French word “pied de grue” (“crane’s foot”) because the branches and the lines of a pedigree resemble the thin crane’s leg with its branching toes. A pedigree is used for different animals, such as humans, birds, mammals etc.
Hence, after analyzing this pedigree, If represents a male with the homozygous recessive genotype (aa), the mother's genotype is homozygous recessive.
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