EVOLUTION CONNECTION Crossing over is thought to be evolutionarily advantageous because it continually shuffles genetic alleles into novel combinations. Until recently, it was thought that the genes...

EVOLUTION CONNECTION Crossing over is thought to be
evolutionarily advantageous because it continually shuffles
genetic alleles into novel combinations. Until recently, it was
thought that the genes on the Y chromosome might degenerate because they lack homologous genes on the X chromosome
with which to pair up prior to crossing over. However, when the
Y chromosome was sequenced, eight large regions were found
to be internally homologous to each other, and quite a few of
the 78 genes represent duplicates. (Y chromosome researcher
David Page has called it a “hall of mirrors.”) Explain what might
be a benefit of these regions.