Gregor mendel has been called the "father of genetics," having formulated laws of inheritance even before the function of dna was discovered. in one famous experiment with peas, he crossed pure breeds of tall and dwarf pea plants. the first generation peas were all tall. in the second generation (f 2 ), he obtained 787 tall plants and 277 dwarf plants. mendel's first law of inheritance is a model with a dominant and recessive phenotype. the first law says that we can expect a 3 : 1 ratio in f 2 ; that is, 3 4 with the dominant phenotype and 1 4 with the recessive phenotype. (a) which aspects of the data are needed for a chi‑square goodness‑of‑fit test? if an item is required, classify it as "yes." if it is not required, classify it as "no."