What eyes will the child have?

Our eyes are said to be the mirror of the soul. They fully express our experiences, joys, mysteries and desires. Long since, with the color of the eyes, their owner was attributed special opportunities. So, in the Middle Ages, a woman with green eyes, could simply be sent to a fire, a charge for witchcraft. And even now, the beauties with brown eyes, sometimes behind her they hear a whisper: "Her eyes are bad, they can jinx it." You can imagine how many families broke up due to the fact that the brown-eyed parents had a blue-eyed child. But such a science as genetics, put everything in its place.

So, what kind of eyes will the child have? Imagine the situation, a child is born, with blue eyes, and by the age of 4, under the influence of sunlight, the eyes acquire a different color. Predict, perhaps, will be difficult, but, perhaps explaining the birth of "white crows."

Genetics

And now a little bit about genetics. There are concepts of recessive and dominant genes that influence the color of the child's eyes. So a recessive gene is genetic information that is suppressed by the dominant gene, and does not appear in the phenotype. The manifestation of signs of a recessive gene is possible only if it is paired with the same recessive gene.

If the recessive gene is paired withdominant, it does not manifest itself, since the dominant gene suppresses it. The qualities that are determined by the recessive gene can be identified in the phenotype of offspring only if it is paired with a certain recessive gene, that is, if this recessive gene is present in both parents. Let's take as an example the combination of the parents of a Tatar man and a Russian woman, and why a Tatar child turns out, and not a combination of both parents. You can pay attention to the dominant and recessive signs of the eyes:

Determination of eye color

You can ask: but how to determine the color of the child's eyes, if both parents have the same both recessive and dominant genes? It's very simple, genetics has done this for you for a long time! Using a special tablet, you can see the likelihood of which eyes your child will have:

• If both parents have brown eyes - the chance for a brown eye in a child is 75%, green is 18.75%, and blue is 6.25%
• If one of the parents is green-eyed and the other has brown eyes - the chance for a brown eye in a child is 50%, green is 37.5%, blue eyes are 12.5%
• If one of the parents has blue eyes, andanother brown, then the child will have either brown or blue eyes with an equal of 50%, and the appearance of a child with green eyes is almost impossible. Except for some genetic factors.
• If both parents have green eyes - the child's chance of green eyes is 75%, the likelihood that he will be blue-eyed 25%, well, the probability for brown eyes is negligible, but it still does.
• If one of the parents has green eyes and the other has blue eyes, then the chances of the child being either green-eyed or blue-eyed are 50 to 50%, without the presence of probability in the brown eyes.
• Well, a pair of parents with both blue eyes, with a probability of 99% will produce a blue-eyed child, and with a probability of 1% - green-eyed.

Sometimes, rare rare colors are foundeyes, such as black and yellow, or snake, gray-kare-green, or rainbow, but a rare genetic phenomenon - heterochromia, allows a person with completely different eyes to be born. Also, the color of the eyes may change in the case of certain diseases, or child injuries.

And finally, the conclusion. In principle, the color of the eyes of parents and children should coincide, but if it happens otherwise, do not be nervous and blame someone for treason, perhaps you have dominant or recessive genes that you do not even suspect!