True-breeding organisms are genetically identical and have identical alleles for specified traits. The alleles for these type of organisms are homozygous.
What is heterozygous Gene and true‑breeding plants ?
Diverse alleles for a particular trait are referred to as heterozygous. You have a heterozygous genotype for that gene if the two copies differ. Which qualities are expressed depends on the interaction between the two alleles.
- You have a heterozygous genotype for that gene if the two copies differ. If you have one gene for red hair and one allele for brown hair, for instance, you may be heterozygous for hair colour. Which qualities are expressed depends on the interaction between the two alleles.
- An organism that consistently transmits particular phenotypic qualities (i.e., physically manifested traits) to its progeny of many generations is said to be true-breeding, often known as a purebred (biology slang: pure line or true-breeding line).