http://therockcolumbia.com/cross-classic/
Cross Classic
Why F1 offspring of Mendel's classic pea cross always have one of the two parent varieties?
pea plants Mendel had purple or white flowers. The gene carries the code for the purple flowers is dominant to the gene that carries the code of white flowers. What Dominant means is that a gene from another masks, masks in this case purple gene target gene. A mask that hides something else. The mask not get rid of him, but hides it not to be seen. When a plant with purple flowers is cross-pollinated with a plant that has white flowers, all of offspring (F1 generation) are inherited a gene from each parent plant color. This means that each F1 plant inherited a gene for purple and one white gene. However, as purple gene masks the target gene, all purple flowers. All these flowers are the white gene, however, even though you can not see, which means that each floor F1 carries the white gene, and can transmit to their offspring, the F2 plants of the information. called "simple dominance" when one gene masks another. There are other types of flowers, where children are a mixture of parental genes. An example is carnations, which can cross a red flower and get pink and white. This is called "dominance incomplete. "
