Question

Multiple alleles are present

• A. At different loci on the same chromosomes
• B. At the same locus of the chromosomes
• C. On non sister chromatids
• D. On different chromosomes

Answer 1

The correct option is B At the same locus of the chromosomes

Multiple alleles are present at the same locus of the chromosomes. Mutiple alleles is a condition where a gene exist in more than two allelic forms that are present on the same locus of the chromosome. A classical example of multiple alleles is found in ABO blood group system of humans. Despite the multiple alleles of any gene, an individual possess and can have only two alleles at a time.

So, the correct answer is 'At the same locus of the chromosomes'.