Final answer:
A male with a Y-linked gene for hairy ears will pass this trait to all of his male offspring, as they will inherit his Y chromosome. Y-linked inheritance is straightforward, affecting only males and passing directly from father to son.
Step-by-step explanation:
A male with hairy ears, which is a trait controlled by a Y-linked gene, should pass this trait to all of his male offspring. This is because males have only one Y chromosome, and if a trait is Y-linked, only the Y chromosome is needed for the trait to be expressed. Consequently, if a male carries the Y-linked gene for hairy ears, each of his sons will inherit that Y chromosome and, therefore, the hairy ears trait. Unlike X-linked traits which can have a more complex pattern of inheritance, Y-linked traits are directly passed from father to son.
An X-linked transmission pattern is different; it involves genes that are located on the X chromosome. Since males have one X and one Y chromosome, the inheritance patterns of X-linked traits are different for males and females, with X-linked disorders being more common in males. Females, possessing two X chromosomes, can be carriers for X-linked traits without expressing the trait themselves. However, they can pass on the trait to their sons or carrier status to their daughters.