If an organism produces two different alleles for a gene, that organism is ___________ with respect to that gene. Question 13 options: dioecious homozygous haploid heterozygous diallelic dioecious homozygous haploid heterozygous diallelic Solution Dioecious - dioecious species has the different male and female reproductive structures. Homozygous - Homozygous species are those ones having identical pair of genes for a given pair. Haploid - haploid cell contain only one complete set of chromosomes. Heterozygous - They carry dissimilar alleles, different genotype and having both dominant and recessive alleles. Diallellic- It is applied to those where two different alleles are present at particular gene. Hence most perfect answer for above question is DIALLELLIC..