The diagram shows a pair of chromosomes from the same cell. What are the lines labelled P indicating?
- Athe site of alleles made up of two or more genes which are always the same
- Bthe site of alleles made up of two or more genes which might be different
- Cthe site of genes made up of two or more alleles which are always the same
- Dthe site of genes made up of two or more alleles which might be different