There are 10 passport offices in the city of Phoenix where citizens of the United States can apply for a new passport. The majority of facilities are located at local post offices. An acceptance agent at these locations will receive your application form and supporting documents, administer an oath and witness the signing of the form.
backcross. in experimental genetics, union between a heterozygote of the first generation and one of its parents or an organism genetically identical to one of its parents. double backcross the mating between a double heterozygote and a homozygote.n experimental genetics, union between a heterozygote of the first generation and one of its parents or an organism genetically identical to one of its parents. double backcross the mating between a double heterozygote and a homozygote.
A double bond in chemistry is a chemical bond between two chemical elements involving four bonding electrons instead of the usual two. The most common double bond, that is between two carbon atoms, can be found in alkenes. Many types of double bonds exist between two different elements. For example, in a carbonyl group with a carbon atom and an oxygen atom. Other common double bonds are found in azo compounds (N=N), imines (C=N) and sulfoxides (S=O).