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

 

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