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.
When Mendel crossed plants that were purebred purple-flowered with plants that were purebred white-flowered, the resulting offspring all had this F generation gave rise to white-flowered plants as well as purple. As a result, Mendel determined that individual traits are.