Down Syndrome

---

Down Syndrome

Release Date: 21 03 2020

This first cell has 46 chromosomes, 23 from the mother and 23 from the father. All the instructions for how the child will grow are in the genes on these chromosomes. Each cell of the body will contain exact copies of the 23 pairs of chromosomes that were in the first cell that was formed by the egg and sperm.Down's syndrome occurs in babies born with extra chromosome 21 material in their cells. Down's syndrome is also known as trisomy 21. Trisomy 21 means there are 3 copies of chromosome 21.