What makes someone a downsyndrome? And how come they have the same features?!
Question:
What makes someone a downsyndrome? And how come they have the same features?
Just wanted to know :) If you know, do drop a comment/answer. :D
Answers:
Down syndrome is caused by having 3 instead of 2 of the chromosome numbered 21 and thus is also called trisomy 21. they look similar because trisomy 21 affects them in the same way.