Eduprobe
Question:
Multiple alleles are present
At the same locus of the chromosome
On different chromatids
On non-sister chromatids
At different loci on the same chromosome
Solution:
Multiple alleles refer to the presence of more than two alternate forms of a gene which should be accommodated on two loci on a homologous pair. This is facilitated by the presence of more than one allele on the same locus of a chromosome provided one allele is present at a locus at a time. Thus, the correct answer is option A.