Such people should not have children

We already know: on the human chromosome, there are a large number of genes. Gene pairs exist, one from the father, one from the mother, genes on the chromosomes have a certain position, known as the site. With a points-based district on the same chromosome are called alleles. The same gene are called homozygous. Different alleles called heterozygotes. Allele pair of characters of the explicit and implicit.

We also know that medicine of human hereditary diseases are divided into three broad categories: first class for chromosome disorders, including diseases of the structure of chromosome aberrations or distortions. Second class for monogenic genetic disease, refers to a single gene or disease arising out of a pair of allelic variation occurs. Third class as a genetic disease, a disease caused by a combination of pairs of genes, such close relationship of genetic diseases and environmental factors.

If any party to the men and women suffering from a severe autosomal dominant genetic disease such as: myotonic dystrophy, cartilage Dysplasia, into bone Dysplasia, congenital aniridia, autosomal dominant hereditary bilateral congenital small eye, are maimed fatal genetic disease, and there is no treatment, child morbidity is high, it is not appropriate to have children.

If you have both marriages suffer from the same severe autosomal recessive genetic disorders such as albinism, their children\'s chances of onset almost 100%. This should not have children. If any party to the men and women with congenital heart disease, schizophrenia, manic depression psychosis 3 types:-genetic diseases, even if a stable condition, should not have children.
Therefore check before marriage is very important.