Crossing over, or recombination, is thought to be evolutionarily advantageous because it continually shuffles genetic alleles in
to novel combinations. Until recently, it was thought that Y-linked genes might degenerate because they have no homologous genes on the X chromosome with which to recombine. 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. How might this be beneficial?
Most of the times, segmental duplicarions occurs to preserve/conserve important regions on the chromosome to avoid extinction. If perhaps a damage occurs in one particular region that has a duplicate, the duplicate is present to help conserve the functions of the damaged regions.
During depolarization, the membrane potential rapidly shifts from negative to positive. As the sodium ions rush back into the cell, they add positive charge to the cell interior, and change the membrane potential from negative to positive.
<h3>adipose tissue cells</h3><h3>adipose tissue cellsUnder a microscope, adipose tissue cells appear empty due to the extraction of fat during the processing of the material </h3>
