Iran received $4.2 billion in similar payments under the 2013 interim agreement with the United States and was then given another $2.8 billion by the Obama administration last year in a bid to keep Iran committed to the talks through November, when negotiators parted ways without reaching an agreement.
The DNA in our chromosomes determines how we develop. Down syndrome is caused when there is an extra chromosome. People with Down syndrome have 47 chromosomes in their cells instead of 46. They have an extra chromosome 21, which is why Down syndrome is also sometimes known as trisomy 21. Although we know how Down syndrome occurs, we do not yet know why it happens.
In many children with Down syndrome, the muscles and ligaments that support the neck are weak and loose. This can potentially cause spinal cord compression, in which the small bones in the neck (vertebrae) press on the spinal cord.