Studied by 0 people
Looks like no one added any tags here yet for you.
Autosomal Dominant:
Traits appear in every generation.
Affected individuals have at least one affected parent.
No carriers—only need one dominant allele (A) to express the trait.
Example: Huntington’s Disease
Autosomal Recessive:
Traits can skip generations.
Carriers (Aa) exist but are unaffected.
Affected individuals must have two recessive alleles (aa).
Example: Cystic Fibrosis.
X-Linked Recessive:
More common in males (males only need one affected X chromosome: XᵃY).
Females are usually carriers (XᵃX) but rarely affected unless they inherit two copies (XᵃXᵃ).
Affected fathers cannot pass the trait to their sons (sons inherit the Y chromosome from their fathers).
Example: Hemophilia, Duchenne Muscular Dystrophy.
X-Linked Dominant:
Both males and females can be affected, but females are often more affected (due to two X chromosomes).
Affected fathers pass the trait to all their daughters but not to their sons.
Example: Rett Syndrome.
