Question

Multiple alleles represent

• A. More than two alternate forms of a gene found at same locus
• B. More than two alternate forms of a gene found at different loci
• C. Occurrence of one gene in two chromosomes
• D. None of the above

Answer 1

The correct option is A More than two alternate forms of a gene found at same locus

The alternative forms of a gene are alleles. Since genes are present on chromosomes on fix loci, an allele is present at the locus on a chromosome. A diploid organism has chromosomes in pairs which mean that it has two alleles for each gene; one allele on one chromosome and other on its homologous member. Thus, two alleles of a gene are present on two different loci on two homologous chromosomes; options B and C are incorrect. 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 provided one allele is present at a locus at a time in a chromosome; option A is correct.