What type of relationship is circled in this pedigree? A. Brother and Sister

B. Aunt and Uncle

C. Mother and Father

Answer is in the photo. I couldn't attach it here, but uploaded it to a file hosting. link below! Good Luck!

cutt.ly/XzW3SUN

The answer is C. Mother and Father

answer; the male's sperm cells have mitochondria, but because the sperm contributes dna but no cytoplasm, no mitochondria are passed to the egg at ferilization;