bio pedigree

Autosomal Dominant Inheritance

A pattern of inheritance where only one dominant allele (A) is needed to show the trait.

1. Genotypes

   • AA: Affected

   • Aa: Affected

   • aa: Unaffected (Normal)

Autosomal Recessive Inheritance

A pattern of inheritance where two recessive alleles (a) must be present to show the trait.

1. Genotypes

   • AA: Normal

   • Aa: Carrier (Not affected)

   • aa: Affected

X-Linked Dominant Inheritance

A pattern where one dominant allele (X^D) on the X chromosome causes the trait. Affected fathers will pass the trait to all of their daughters.

1. Genotypes

   • X^D X^D / X^D X^d: Affected Female

   • X^d X^d: Unaffected Female

   • X^D Y: Affected Male

   • X^d Y: Unaffected Male

X-Linked Recessive Inheritance

A pattern where males are affected if they inherit one recessive allele (X^a), while females typically require two.

1. Genotypes

   • X^A X^A: Normal Female

   • X^A X^a: Carrier Female

   • X^a X^a: Affected Female

   • X^A Y: Normal Male

   • X^a Y: Affected Male