Identify each family member's genotype in this pedigree for high-altitude adaptation. if you can't tell with certainty whether an individual is homozygous dominant or heterozygous dominant, place the label "rr or rr" in that box.

As you can see in the pedigree presented below, the allele that enables the adaptation for living in high altitudes is recessive, meaning that two copies of this allele are necessary in order for the individual to possess this trait.