Do you see what you confused Minuteman. The Y chromosome itself is single and only has identical genes to repare itself so nothing changes. The recombination you speak of in meiosis is the X and Y joining and which genes actually combine and are dominant. Even at this state they only join at the tip cause if they recombined completely the y chromosome would overtake the X and make all male sex. Here is another article explain how the Y chromosome links all males back.

The decay of the Y has to do with nature barring the Y chromosome from recombining (forming new genetic combinations) with the X, except for at the tips. If not for this, the male-determining gene on the Y chromosome would sneak into the X, making everyone male. In the mid 1990’s The Whitehead Institute for Biomedical Research in Cambridge, MA and Washington University’s Genome Institute began a collaboration to sequence the human Y chromosome. This historic sequence and analysis was published in 2003, representing the first and only Y chromosome (from any species) to be sequenced.

Because the Y chromosome changes relatively slowly over time and is only passed along the direct male line, it may be used to trace paternal lineage. It was also found that the Y chromosome contains genes which are implicated in cancer, Turners syndrome, stress response, high blood pressure, graft rejection and harbors many genes essential for male fertility.