Chromosomes occur in pairs (in most somatic cells) since one member of each pair comes from the mother and the other from the father. In most prokaryotes, the chromosome is usually a circular strand of DNA; hence, the entire genome is carried on only one chromosome.
Thus, an average diet of 1,900 calories per day would dictate an intake of 1,900 ml (approximately 64 ounces) of water. However, people interpreted this as a recommendation to drink 1,900 ml of pure water, forgetting the fact that water is also found in abundance in the other liquids and foods we consume.
This comes to a total of 2000 ml (2 litres) to 2500 ml (2.5 litres) or about 8 to 10 cups per day, give or take. Output. Water is lost through normal physiological activities: respiration (breathing) and perspiration [we lose about 500 ml to 650 ml, or just over 2 cups, per day]