Ethanol is a fuel produced by fermenting crops
Explanation:
In the majority of cases, the extra copy of chromosome 21 comes from the mother in the egg.
In a small percentage (less than 5%) of cases, the extra copy of chromosome 21 comes from the father through the sperm.
In the remaining cases, the error occurs after fertilization, as the embryo grows.
From tiny blood cells/vessels!
Hope this helps!
Answer:
its affected by the number of chromosomes they have
The least reactive element in the third period is argon.