A family from coastal Africa recently moved to Canada. Soon after the move, their 6-month-old baby starts napping more frequently and often cries as if in pain. Concerned, the parents take their baby...

A family from coastal Africa recently moved to Canada. Soon after the move, their 6-month-old baby starts napping more frequently and often cries as if in pain. Concerned, the parents take their baby to a pediatrician, who diagnoses the baby with Sickle Cell Disease. The parents are astonished; neither has Sickle Cell Disease nor do their parents or siblings. How could this be possible?

Use your knowledge of Mendelian Genetics and patterns of Inheritance to explain how this baby has Sickle Cell Disease when neither parent exhibits this disease phenotype. What term(s) could be used to describe the genotype of the baby's parents? What term(s) could be used to describe the genotype of the baby with Sickle Cell Disease?