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!
The answer depends in large part on the kind of flyer you are, and how you earn and spend your miles. We've seen frequent flyer gurus estimate that miles are worth anywhere between one-half to six cents per miles, when one calculates how much in fare value miles will buy. To test that, we looked at five route and fare class scenarios to compare how much each would cost if we were to buy the flight using our hard earned cash versus using miles.