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!
You don't want to use 25000 miles on a ticket that you can buy with $200. As a rule of thumb, you should use it when each mile give you at least 2 cents. The most lucrative way is to redeem the miles on international business class ticket (or even first). Most of these require 110000 or more miles round-trip even for saver award, so it takes time to save up for it.