The inheritance rule was initially discovered by Mendel and itdepends on clear or qualitative traits. The theory was based on asingle gene that was responsible for one character. However,expression of many traits are not governed by a single gene, rathercan involve multiple genes as well as additive effects. This kindof inheritance pattern is known as quantitative and is demonstratedby East (1916) as well as others. He performed experiments using 2homozygous, pure-breeding lines of Nicotiana longiflorathat differed in corolla length. After crossing these lines, F1offspring had an intermediate length for corolla and had samevariation level as in parents. But found a very different resultfor F2 and F3 than expected. Discuss the reasons for this resultand if it agrees/disagrees with Mendel’s law. Using obtainedknowledge so far, what kind of cumulative effects would you add tothis variation?
