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?
I
II.
III.
d
5
X
OA. A female with no recessive alleles
OB. A male with one recessive allele
C. A male with no recessive alleles
O D. A female with one recessive allele