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!
Once on the British Airways website, go to Spending Avios under Executive Club and you will be asked to log in. Go to Spending Avios on British Airways website. You then want to select the option to Book Flights with Avios on the left hand side.merican Airlines just charges miles based on region. According to the American Airlines Award Chart, if youâre flying from the US, you will be paying peak season prices of: 1  Within the US: 12,500 each way in economy; 25,000 each way in first class.