Often different genes can interact in a way that influences the same trait. In the Blue-eyed Mary (Omphalodes verna), for example, there exists a gene with alleles that determine the color of flowers: blue or magenta. Another gene, however, controls whether the flowers have color at all or are white.
The regular price of buying miles from American is about 3.17 cents per mile ($29.50 per 1,000 miles plus a 7.5% Federal Excise Tax) â before a $30 Processing Charge per purchase â but with the maximum bonus offer, itâll actually drop your price down to just 2.02 cents per mile!
That's based on most airline programs' 25,000 miles price for a coach ticket and an average $350 value for that ticket. Using this 1.4-cents-per-mile baseline, you can calculate whether any ticket is worth using your miles for.Divide the price of the ticket by the number of miles a ticket can be purchased for. If the per-mile value is over 1.4 cents (or 1.2 cents, if you want to add a hassle cost), then use your miles.SmarterTravel has these examples: Cashing in 25,000 miles for a ticket that could be purchased for $100 yields just .4 cents (four tenths of a cent).f the per-mile value is over 1.4 cents (or 1.2 cents, if you want to add a hassle cost), then use your miles. SmarterTravel has these examples: Cashing in 25,000 miles for a ticket that could be purchased for $100 yields just .4 cents (four tenths of a cent).