LIFE SCIENCE

Detailed explanation-1: -Alleles are the alternative forms of a gene for producing different effects. The homologous individual contains two alleles which are the same for that gene. Heterozygous individuals contain the elements which are different for that gene. Alleles are usually used to describe the variation among genes.

Detailed explanation-2: -A gene is located at specific locus on a chromosome. Different genes occupy non-identical loci on a chromosome or on different chromosomes. Allele are the two alternative forms of a gene which are present at the corresponding loci of homologous chromosomes.

Detailed explanation-3: -Normally, every gene has two alternative forms for a character producing different effects. These alternative forms are called as alleles.