When did Gregor Mendel do his pea plant experiment?

Biology questions having to do with Gregor Mendel's pea experiment on genes! PLEASE ANSWER QUICKLY!!!!!?

• Back info. Austrian Monk named Gregor Mendel preformed a gene experiment with pea plants and genes. 1. What did Mendel conclude determines biological inheritance? 5.Why did only about one fourth of Mendel's F2 plants exhibit the recessive trait? 6. Why were true breeding pea plants important for Mendel's experiments?

• Answer:

  1. Independently assorted characters that can be passed from parent to offspring. 2. The traits he observed were genetically heritable and separable, with only two alleles per gene. They follow simple patterns of dominance, so the recessive phenotype is only present in individuals with the homozygous recessive genotype. This only occurs at an approximate frequency of 1/4 individuals. 6. Those individuals that he classified as true breeding expressed the dominant phenotype, and possessed the homozygous dominant genotype. If the plants that he used were not true breeding, but rather heterozygous, then the ratios of phenotypes that he observed in the F2 generation would not have appeared, and he likely would never have discovered his rules of inheritance.