What did gregor mendel determine by his experiments with pea plants?

the rules for inheritance of simple traits

He cultivated some pea plants and the result of his study was that one in four pea plants had purebred (homozygous) recessive alleles, which means you have two recessive genes in the genotype (hh). Two out of four were hybrid (heterozygous) - one recessive and one dominant gene (Hh). Finally, one out of four were purebred dominant, which means you have two dominant genes in the genotype (HH). His experiments led him to make two generalizations, the Law of Segregation and the Law of Independent Assortment, which later became known as Mendel's Laws of Inheritance.