Mendel used the term ‘allele’ in his experiments. Which of the following options explain the meaning of allele correctly?

The correct option is A Different versions of the same gene
Allele refers to different versions of the same gene. Genes occupy a certain position on chromosomes. Alleles can be thought of as the two forms of the gene that occupy those positions on homologous chromosomes. One form may be dominant over the other. The gene coding for seed shape in pea is located on the same spot on homologous chromosomes, that is the same chromosome from the maternal and paternal parents. When it comes to seed shape, round is dominant over wrinkled.