You are here : / / / 6 Reasons Why Your Gums are Bleeding. If you regularly see red when you brush your teeth, it could be cause for concern. Here's why your gums are bleeding ' and what to do about it. Jackie Middleton.
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.
3) The Law of Dominance: An organism with alternate forms of a gene will express the form that is dominant. The genetic experiments Mendel did with pea plants took him eight years (1856-1863) and he published his results in 1865.