16. Sex-Limited Traits Autosomal, not found in the sex chromosomes Genes are carried by both males and females, but only one sex would ever express them Example: genes that influence how much milk a lactating mother produces when she’s nursing a baby Another example: cryptorchidism (undescended testicles)
18. Sex-Influenced Traits Autosomal, not found in the sex chromosomes Genes are carried by both males and females, but there is a difference in the way the two sexes express them Example: pattern baldness in humans. The baldness allele behaves like a dominant allele in males, while in females it behaves like a recessive allele
20. Sex-Linked Traits Genes are found on the sex chromosomes Sex-linked traits are behave differently from autosomal traits when sex chromosomes are non-homologous May be dominant or recessive in nature Phenotype is dependent also on the presence of a complete gene pair or just one allele Example: Hemophilia (X-linked)