High levels of acid in blood are toxic to cells. Acidic blood or acidosis is toxic to your cells and can reduce their abilities to function properly. When your cells are impaired, they have a hard time fighting bacterias and virus. In addition, they carry less oxygen and cannot effectively utilize nutrients.
Fertilization of the egg by the sperm restores the diploid number of 46 chromosomes. We have 46 chromosomes that, if you lined them up by size and shape (karyotyped them), are actually 23 pairs of chromosomes - one was originally from mom and the other from dear 'ol dad.
Prophase is an involved process and while the chromosomes are visible throughout, they look different depending on the stage of the process the cell is in. During early prophase, the chromosomes are working to condense and shorten in preparation for cell division and they appear under the microscope as a condensed mass; it is hard to distinguish individual chromosomes at this point.