200 years ago, scientists named to the basic features of Mendelian inheritance, through the study of plants, some specific characteristics, and how to pass from one generation to another. Sexual reproduction in all organisms, a generation has inherited many of the characteristics and the last; an organism inherits two possible giver Characters, every parent, and one of these characteristics will, each to their own offspring .
When a child inherits two different characteristics, one of them is dominant, so the control of its genes are activated, and other specific traits of the gene is recessive. But even if it is not activated, recessive genes can be passed to the next generation.
A person inherits the gene brown eyes and blue gene will most likely have brown eyes because brown is the dominant gene in a pair of blue eyes. On the other hand, if both parents have blue eyes, which means they have a brown eye gene, so there is no a child can have brown eyes. However, it is possible and vice versa: a person with brown eyes are a recessive gene for blue eyes. If both parents have a dominant gene for brown, but a recessive gene for blue eyes, it may be that their children inherited two genes blue eyes.
Nevertheless, inheritance is not so simple, one dominant and one recessive gene, a person can have two genes activated at the same time. The result? In between ... For example, one can inherit a gene for straight hair, curly hair and one side, resulting in hair: between straight and curly. Inheritance is actually quite complex, but some things are clear. Possible combinations, and the combination can not occur.
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