Biology
Difference Between Homozygous And Heterozygous
Homozygous is a cell for a particular gene in the condition when identical alleles are present on both homologous chromosomes. on the other hand, Heterozygous is a diploid organism at a gene locus when a cell contains two different alleles of a gene. the basic difference between Homozygous And Heterozygous is that Homozygous have recessive allele or dominant pairs. it produced a single type of gametes, do not show an extra vigor while Heterozygous have both dominant and recessive alleles, can show extra vigor, self breeding producing a combination of different trains.
Difference Between Homozygous And Heterozygous in Tabular Form
| Homozygous | Heterozygous |
| It has two same copies of the same allele coding for a particular trait. | It contains two different copies of alleles coding for a particular trait. |
| Contains only one type of allele, either dominant or recessive | Contains different alleles for a trait. Both dominant and recessive |
| Self-fertilization results in the repetition of the same traits over generations | Self-fertilization results in different combination of traits over the next generations |
| Only one type of gamete is produced | Two types of gametes are produced |
| It can be either homozygous dominant or homozygous recessive | Heterozygous alleles can show complete dominance, codominance or incomplete dominance |
| Common diseases associated with the homozygous condition include fibrosis, sickle cell anemia, and phenylketonuria. | Common diseases associated with the heterozygous condition include Huntington’s disease, Marfan’s syndrome, and familial hypercholesterolemia. |
| Organisms or cells with the homozygous condition are termed as homozygotes. | Organisms or cells with the heterozygous condition are termed as heterozygotes. |
| The homozygous condition doesn’t show hybrid vigour. | Heterozygous condition shows hybrid vigour. |
| Homozygous genotypes are represented as AA or aa for homozygous-dominant or homozygous-recessive conditions, respectively. | Heterozygous genotypes are represented by Aa genotypes. |
| Two different phenotypes are possible with dominant or recessive homozygous conditions. | The phenotype is mostly due to the dominant allele in the heterozygous condition. |
| Example- either RR or rr | Example- Rr |
