What are the possible alleles for Alu PV92?

Answer 1

There are no gene involved, so the alleles can't be dominant nor recessive as we usually see it. The PV92 refers to the specific locus on the human genome in which you can either have or not have a 300 basepair (bp) long insertion (referred to as Alu or Alu-sequence or Alu-insert).

So we are simply looking for if the insert is there (+) or not (-). Therefore the alleles are named "+" and "-". The genotypes can be homozygous +/+ or -/- or heterozygous +/- (or -/+).

Remember that the locus PV92 located on chromosome # 16 is a non-coding area of the genome, whereas the above genotypes gives no phenotypic difference. Hence we can't talk about any dominant/recessive characteristics.

Answer 2

The possible alleles for Alu PV92 are "A" and "G." The "A" allele indicates absence of the Alu insertion at the PV92 site, while the "G" allele indicates presence of the Alu insertion at the PV92 site.