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What are the characteristic features of a true-breeding line?

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True breeding is a stable trait inheritance and expression for several generations as a result of continous self-pollination.
Charactersitic features of a true-breding line
(i) They are used as parents in atificial hybridisation as they provide gametes with all similar traits.
(ii) Homozygous recessive plants are used n test cross to determine the genotype.
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