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7.2.1 Historical overview
The classic study of maternal inheritance was performed by Correns on the four o'clock plant.
The embryo is formed when a female gamete unites with a male gamete. In the vast majority of species, the female gamete is physically larger than the male gamete and provides the cytoplasm for the developing embryo.
William R. Engels Genetics Department , University of Wisconsin
Example 1: Two Point Cross