What is the term given to the contrasting traits of gene ?

Alleles .

The correct answer is Option (2) -Alleles .

The term given to the contrasting forms of a gene (variants of a gene that produce different characteristics or traits) is Alleles.

Alleles are alternative versions or variations of a gene that occupy the same position (locus) on a chromosome and code for specific traits. They can produce contrasting phenotypic effects, resulting in different observable characteristics. For example, in the case of eye color, alleles could be variations of the gene determining blue or brown eyes. The term "alleles" refers to the different options available for a particular gene or trait.