Question

Attached earlobes are a recessive trait in humans. In the tree below, people with attached earlobes are shaded in. Which best describes the person labeled X in the tree?
C. A male with one recessive allele
D. A male with no recessive alleles

Answer 1

If this follows the normal format for genetic trees, its neither, as a circle is a female, not a male. If it is a female, then it would be a female with one recessive gene.