Final answer:
Gregor Mendel received the necessary knowledge to analyze phenotypic ratios through his study of mathematics and statistical methods.
Step-by-step explanation:
Gregor Mendel received the necessary knowledge to analyze phenotypic ratios from his experiments through his study of mathematics. Mendel used statistical methods and the laws of probability to analyze his data and develop his model of inheritance. By examining sample sizes and applying mathematical principles, Mendel was able to demonstrate the correlation between genotype and phenotype.