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!
40% mileage bonus ($135): With Americanâs switch to a revenue-based model for earning miles in August 2016, Gold members now earn 7 miles for every dollar spent on flights, 2 miles more than a non-status flyer. Based on the assumed flying above, that would give you an additional 9,000 miles, worth $135.