The genotype of the parents is Uu.
The genotype of the offspring, represented as uu, is a homozygous recessive condition, suggesting that both alleles inherited from the parents are of the recessive type. In this scenario, the parents' genotypes can be deduced by recognizing that to express the recessive trait, an individual must inherit two copies of the recessive allele.
Since the offspring has the genotype uu, both parents must have contributed a recessive allele 'u.' Consequently, the parents' genotypes are inferred to be Uu, signifying a heterozygous condition where one allele is dominant (U) and the other is recessive (u). This explanation aligns with the principles of Mendelian genetics and the inheritance of traits through the segregation of alleles during reproduction.