Simplify the following text for a Grade 11 native English-speaking person.
Original: Allele frequencies or , allelic frequency , is the proportion of a given allele to all alleles at the same gene locus .
Simplified: Allele frequency is the proportion of all copies of a gene that is made up of a particular gene variant ( allele ) . In other words , it is the number of copies of a particular allele divided by the number of copies of all alleles at the genetic place ( locus ) in a population .