Two unaffected parents (top) have both affected and unaffected children of both sexes. The trait is most likely
- A
X-linked recessive (mother is a heterozygous carrier)
- B
Mitochondrial inheritance (mother passes to all offspring)
- C
Autosomal dominant (one parent is heterozygous affected)
- Dcheck_circle
Autosomal recessive (parents are heterozygous carriers)
Explanation
Affected children of two unaffected parents → recessive. Both sexes affected → autosomal (not X-linked).