What gender does down syndrome affect most?

Down syndrome:

1. Down syndrome is a genetic disorder that leads to several physical and mental disabilities.
2. It occurs due to the presence of an extra chromosome 21 referred as trisomy of chromosome 21.
3. Down syndrome seems to occur more among males than females.
4. Other than physical attributes and mental retardedness, furrowed tongue, congenital heart defects are seen, thyroid disease, sleep apnea, and gastrointestinal defects.