Question

The pedigree below shows inheritance of the dominant trait polydactyly. Individual II-4 has 6 fingers on their right hand, while individual IV-3 has an extra toe on each foot. Individual III-2 has 10 fingers and 10 toes. These individuals show a range of incomplete penetrance.

Answer 1

Polydactyly is a condition where individuals have extra fingers or toes. In this pedigree, the trait of polydactyly is inherited in a dominant manner, but most people have five fingers because the polydactyl allele is very rare in the human population.

Step-by-step explanation:

Polydactyly is a condition where individuals have extra fingers or toes. In this pedigree, the trait of polydactyly is inherited in a dominant manner, meaning that individuals with the trait only need one copy of the polydactyly allele. However, most people have five fingers because the polydactyl allele is very rare in the human population, represented by option d.