Final answer:
Organisms can only carry two alleles for a gene, which pass on from parents to offspring through sexual reproduction.
Step-by-step explanation:
Genetics of Inheritance
Each individual in a population of diploid organisms can only carry two alleles for a particular gene, but more than two may be present in the individuals that comprise the population.
The specific variations possible for a single gene are called alleles.
These alleles determine the traits associated with a particular gene and are passed on from parents to offspring through sexual reproduction.
Only heritable traits can evolve, so organisms must be able to reproduce with each other to pass new traits to their offspring.
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