How does the pedigree of an autosomal recessive trait differ from the pedigree of an X-linked recessive trait?
a. Autosomal recessive traits appear equally in males and females; X-linked recessive traits are more common in males
b. Autosomal recessive traits require both parents to be carriers; X-linked recessive traits can be passed from an affected father to all daughters
c. Autosomal recessive traits can skip generations; X-linked recessive traits cannot
d. Autosomal recessive traits are only passed through the maternal line; X-linked recessive traits can be passed through both parents