\t\t\tMeaningIf the diploid organisms carry two copies of each gene, they may be identical alleles so called homozygous.But if the diploid organisms carry two copies of each gene, which can be different (dominant and regressive) alleles, can be said as heterozygous.Results inIt brings similar individuals, means it is pure for a trait and breeds true. E.g., RR, rrIt brings dissimilar individuals, which means heterozygous individual is rarely pure and produces offspring with different genotype. E.g. RrIt carriesHomozygous carries similar alleles of a trait. E.g. RR, rr.Heterozygous carries dissimilar allele e.g. Rr.Type of allelesHomozygous individual can carry either dominant or recessive alleles, but not both at a time.Heterozygous individual has both, i.e. one dominant and one recessive alleles.Type of gametes producedOnly one type of gametes are produced.Two types of gametes are produced.\t
Homozygous means both the copies of a gene match while heterozygous means that the copies do not match.