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!
Although the standard mileage award for a domestic economy ticket on most airlines requires 25,000 miles, making each mile's value a paltry 1 cent, airlines sometimes require up to 60,000 miles roundtrip for the same trip, reducing the value to less than one-half cent.or example, one of the worst ways to spend miles is to buy an economy class ticket on a flight between New York and Los Angeles, which typically costs around $300 round-trip in tax, and sometimes goes as low as $219.