It requires only one affected allele in order to express that trait.Group of answer choicesautosomal dominant disorderautosomal recessive disorderNext

Understanding the Concepts

1. Autosomal Dominant Disorder: This type of disorder requires only one copy of the mutated allele for the trait to be expressed. If a person has one affected allele (either homozygous or heterozygous), they will show the trait.

2. Autosomal Recessive Disorder: This type of disorder requires two copies of the mutated allele (homozygous) for the trait to be expressed. A person with only one affected allele (heterozygous) will not show the trait and is considered a carrier.

Conclusion

Since the question specifies that only one affected allele is needed to express the trait, the correct answer is autosomal dominant disorder. This is because in autosomal dominant disorders, the presence of just one mutated allele can lead to the manifestation of the trait or disorder.