True breeding parents might only pass one (1) trait variant to their offspring (Option A).
What is true breeding?
A true-breeding can be defined as a special type of mating where parents produce offspring that have the same phenotype.
True breeding occurs when parental lines having a given phenotype generate descendence with this same phenotype.
These parents need to be homo-zygous, i.e., they need to have the same gene variant or allele, for the trait to be inherited.
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