Human genetic variation is the genetic differences both within and among populations. There may be multiple variants of any given gene in the human population (genes), leading to polymorphism. Many genes are not polymorphic, meaning that only a single allele is present in the population: the gene is then said to be fixed.
Expense of the blood glucose test strips. Over time, test strips are often the most expensive part of monitoring your blood sugar, so keep in mind the cost of compatible strips when choosing your glucose monitor. On average, glucose test strips range from 35Â¢ to $1.00 each.
Cost estimate for at-home whitening materials: (Your dentist's cost.) 1  One syringe of whitening gel - $3.00 to $8.00. The price will vary depending on the volume/size of the syringe and possibly the concentration of the whitener. 2  Sheet of plastic to make 1 bleaching tray (upper or lower) - $1.00 to $2.00.