Many genetic diseases are due to the pregnancy didn\'t do check before, found only after the birth of a child, but was too late, causing unnecessary pain to the parents and children. Modern medicine has developed, through chromosome checks to prevent hereditary diseases.
Chromosomes in the nucleus, is the primary carrier of genetic information. Humans have 46 chromosomes in each cell, can be mixed into 23 on, first to the 22nd called autosomal, it is common to men and women; the 23rd is a sex chromosome. Female sex chromosomes are two x chromosomes, males are x, y, the article.
Chromosomes carry genes of sperm and egg, record the genetic parents to their children. But the bad genes are passed on to the next generation of parents, now know there are more than 4,000 kinds of genetic disease. Male infertility disease of which you can check on chromosome know in advance.
There many ways to check the chromosomes, chromosome banding technique means first on human chromosome staining with quinacrine, appeared in each of the chromosomes to the width and location of each horizontal stripes, then to heat, alkali, salt, and enzymes such different treatment, showed a series of colored dense white horizontal stripe, called banding pattern. It can help us distinguish between chromosome defect, enhance the ability of recognition.
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