Final answer:
In a pedigree for an X-linked recessive trait, you would not expect to see the trait transmitted from father to son, as males cannot pass their X chromosome to male offspring. Affected sons typically have carrier mothers and unaffected fathers.
Step-by-step explanation:
In a pedigree outlining an X-linked recessive trait, you would NOT expect to see male-to-male transmission of the trait, because males cannot pass their X chromosome to their sons. Since males have only one X chromosome, they will express the recessive trait if their single X chromosome carries it. Females, having two X chromosomes, can be carriers if they have just one copy of the recessive allele.
Therefore, an unaffected male cannot transmit an X-linked recessive trait to his sons, but his daughters can be carriers if they inherit the recessive allele from their mother.
Affected sons often have unaffected fathers and carrier mothers. Carrier status in females is another characteristic important in understanding X-linked recessive traits and their representation in pedigrees. Any indication of trait inheritance from father to son in a pedigree would suggest against the trait being X-linked recessive.