Final answer:
The statement that Y-linked disorders can affect males or females is not true; Y-linked disorders only affect males since they involve mutations on the Y chromosome, which only males possess.
Step-by-step explanation:
Which of the following is not true about Y-linked disorders? The statement that is not true is that they can affect males or females.
Y-linked disorders are conditions that involve mutations along the Y chromosome. These disorders only affect males because only males carry a Y chromosome. Females have two X chromosomes and do not possess a Y chromosome, so they cannot be affected by disorders linked to the Y chromosome. Due to the Y chromosome's limited size and gene content, Y-linked disorders are relatively rare and often lead to issues with male fertility. The most notable characteristic of Y-linked disorders is that affected males can transmit the disorder to all of their male offspring because males always pass on their Y chromosome to their sons.