: Students work backwards from offspring phenotypes to determine the exact alleles ( IAcap I to the cap A-th power IBcap I to the cap B-th power ) of the parents .
She possessed the incredibly rare Bombay phenotype. Because she lacked the ability to produce the H-antigen—the chemical base required to make A or B antigens attach to red blood cells—her blood tests always defaulted to type O. She was a genetic chameleon. She carried the functional B gene, but it was masked, hidden in plain sight for her entire life. lab activity blood type pedigree mystery answer key upd
: If the blood types of the parents are known, their genotypes can be inferred. For example, if a parent has Type A blood, they could be either AA or AO. : Students work backwards from offspring phenotypes to
Many updated labs include the Rh factor (+/−) as an additional layer. The key explains that Rh-positive is dominant (Rh+/Rh+ or Rh+/Rh−) and Rh-negative is recessive (Rh−/Rh−). This simulates more realistic forensic genetics, where multiple markers increase certainty. She was a genetic chameleon
trait. Free earlobes are dominant (F), while attached earlobes are recessive (f). Individuals with attached earlobes must have the genotype ABO Blood Types : This involves multiple alleles cap I to the cap A-th power cap I to the cap B-th power codominance cap I to the cap A-th power cap I to the cap B-th power