Question

Differentiate between homozygous and heterozygous organisms in a tabular form.

Answer 1

Homozygous	Heterozygous
It is pure for a trait and breeds true i.e., gives rise to similar homozygous individuals on self-breeding or breeding with another individual with the same genotype.	Heterozygous individual is seldom pure and produces offspring with different genotypes on self breeding or breeding with another heterozygous individual, eg., TT, Tt and tt on self breeding of Tt individuals.
Both the alleles of a trait are similar, e.g., TT,tt	It carries dissimilar alleles, e.g., Tt
Homozygous individual can carry either dominant or recessive alleles but not both.	Heterozygous individual has both dominant and recessive alleles.
It produces one type of gametes.	It produces two types of gametes.