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!
Beginning on Jan. 1, 2014, the standard mileage rates for the use of a car (also vans, pickups or panel trucks) will be: 1  56 cents per mile for business miles driven. 2  23.5 cents per mile driven for medical or moving purposes.  14 cents per mile driven in service of charitable organizations.