how many pea plants did mendel use
Between 1856 and 1863 Mendel cultivated and tested some 29,000 pea plants (Pisum sativum). This study showed that one in four pea plants had purebred recessive alleles, two out of four were hybrid and one out of four were purebred dominant.
Mendel's experiments with true breeding pea plants led us to a deeper understanding of how and why parents pass on specific traits to their offspring. Mendel used true breeding pea plants for a certain trait. He would then cross them and see what the resulting offspring looked like. He found that the resulting offspring ALWAYS looked like just one of the parents, not a combination of the two.