Final answer:
The multiplication method for multiple genotypes is the probability method, which calculates the proportions of offspring expected to exhibit each phenotype or genotype without visual aid.
Step-by-step explanation:
The multiplication method for multiple genotypes in genetics is known as the probability method. This method calculates the proportions of offspring expected to exhibit each phenotype or genotype without the visual assistance of diagrams. It uses the product rule and considers the alleles for each gene separately.