If a gene has two alleles, and allele A has a frequency of 83 percent, then allele a has a frequency of:

Rna polymeras should attache to the promoter.

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass