If having more than five fingers occurs because of a dominant gene,what needs to happen for a person to have more than five fingers?

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If having more than five fingers occurs due to a dominant gene, then a person would need to inherit that gene in order to have more than five fingers. This would mean that the dominant allele would be expressed in the phenotype over any recessive alleles. B and C are not relevant as they do not account for the fact that having more than five fingers is due to a dominant gene, and D is not necessary as only one dominant allele is needed to express the trait.

If Having More Than Five Fingers Occurs Because of a Dominant