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.
Since then, The British Dietetic Association has declared that an average adult should drink 10.5 cups of water per day. Also, the Journal of the American Dietetic Association says the average sedentary man should drink 12 glasses of water a day, and the average sedentary woman 9 glasses per day. The truth is water is an essential nutrient for life.