Question

the pedigree below shows the inheritance of a sex-linked dominant trait. fill in the correct genotypes below. use \f\ for dominant and \f\ for recessive.
x-linked dominant

Explanation:

Step1: Identify affected female genotype

For X-linked dominant, affected females have one dominant allele. Genotype: $X^F X^f$ or $X^F X^F$; since her offspring would inherit one X, the most probable heterozygous form (as unaffected partners would pass recessive) is $X^F X^f$.

Step2: Identify unaffected male genotype

Unaffected males have no dominant allele. Genotype: $X^f Y$

Answer:

1. $X^F X^f$
2. $X^f Y$