Inheritance Patterns
Sex-linked dominant traits are transmitted to both males and females, both of whom can be affected. Because the trait is dominant, no carrier state exists; all persons with the gene express the trait and appear as totally blackened symbols in pedigrees. Similar to X-linked recessive traits, males transmit the trait to all daughters but never to sons, and females transmit the trait to 50% of their offspring, regardless of sex.
Examples of this inheritance pattern are the Xga blood group system (see later) and vitamin D-resistant rickets (hypophosphatemia).
See Figure1-6.
| Inheritance Patterns
| Sex-linked Dominant Pattern |