16 Сентября 2019 г.
Iron Core Edge   there is a triple instead of a double copy of the 21st chromosome. Excessive amount of genetic material located in this chromosome is the cause of the characteristics of this syndrome. Belong to them:typical appearance changeslowering the IQmany accompanying flawsNowadays, the progress of medicine allows treatment of the most serious effects of Down syndrome. As a result, the average life expectancy of patients receiving appropriate care has been extended to around 50-60 years.Genetic background for Down syndromeBefore we get to know the nature of the disorders underlying Down syndrome, it is worth understanding a few basic concepts of genetics .
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