Biology for IGCSE & O level - Inheritance (Section 6 - No. 13)

Which of the following statements is true regarding the inheritance of autosomal dominant disorders?

Affected individuals must have at least one affected parent.

Affected individuals can be heterozygous or homozygous dominant.

The disorder can skip generations.

Unaffected individuals cannot pass on the disorder.

Autosomal dominant disorders usually manifest in every generation. Affected individuals possess at least one copy of the affected allele.